Explosive Cigar

We three kings of Orient are
Trying to smoke a rubber cigar.
It was loaded, it exploded --
Now we're on yonder star.

A character gets a "cigar", puts it into his mouth, lights it, EXPLOSION! Another victim of the explosive cigar! This sort of thing commonly occurs in cartoons.

In a comedic work, after the smoke clears, the sap will have a smoke-blackened face, their eyes will be bugging out in alarm and the cigar will now be a stub with a star-shape of peeled-back cigar paper at the end. In more serious works, the results will typically end up being fatal.

A form of Non-Fatal Explosions. Also see Ash Face. Compare Eat the Bomb.

Examples of Explosive Cigar include:

Anime and Manga

An early chapter of the original Lupin III manga had the title character toss a cigarette at a villain, which then explodes. Also occurs to Jigen in Tokyo Crisis after he picks up the wrong cig.
- Basically, it's one of Lupin's favorite means of distracting his foe when in a tight situation. A partial subversion happens in Dragon of Doom: Lupin asks the yearly one-shot villain for one last smoke before getting gunned down. He accepts but takes away Lupin's lighter and pack of cigarettes and lets him smoke one of his own cigars. However, when he throws the cigarette pack into the water, it explodes and releases a smoke screen, allowing Lupin to escape unscathed.

Comic Books

In the Batman comics, The Joker has been known to kill people with exploding cigars loaded with a lethal charge of explosives. Superman's foe the Prankster sometimes uses them as well.
In the first Post-Crisis Batman/Superman Crossover (in John Byrne's Man of Steel miniseries), female villain Magpie killed a henchman who had failed her by stabbing him with a poisoned needle that paralyzed him. Once he couldn't move, she stuck a dynamite stick into his mouth, lit the fuse and walked away. Her name for this? "Happy Birthday".
In an Alternate Continuity Batman/Lobo crossover, Lobo kills Penguin this way.
In Tintin, it's done with the Spoiled Brat of the one Arab sheikh.
MAD magazine had an example in Sergio Aragones' "A MAD Look at Smoking"; a guy s given a cigar by a co-worker, but he can't smoke it in the break room, where smoking isn't allowed. He's not allowed to in the bar down the street, or a restaurant, or most other places he goes to. Finally, he finds a club for folks who smoke cigars, and lights up... Only for it to explode, resulting in everyone in the club laughing at him.

Film

Disney's Mars and Beyond has a segment where a secretary is kidnapped by Martians. She eventually changes into a superheroine and defeats the Martians by giving them exploding cigars. You can watch it here, starting at 7:05.
The Tall Blond Man With One Black Shoe: Francois' pal Maurice, a practical joker, hands out a couple of exploding cigars - one of which, late in the picture, goes off in an ashtray during a tense standoff between four men, all of whom promptly shoot each other.
Yellow Submarine: a big, pugilistic monster is thwarted when the sub fires a cigar into his mouth, then, converting to a lighter, obligingly lights it. A few peaceful bars of Bach, then, Ka-BOOM!
In V for Vendetta, Stephen Fry's sketch involved an exploding cigar being smoked by the tyrannical dictator of the United Kingdom.
In Road to Morocco, Hope and Crosby escape from the Sheik by putting gunpowder into, not cigars, but cigarettes.
An odd one is smoked in April Fool's Day, as it takes quite a while before exploding.
Police Academy 6 sees the Wilson Heights gang offer a cigar to their silhouetted mastermind, and fall about laughing when it goes off, complete with his shadow hat lifting off his head briefly. Probably because, when it goes bang, you can actually see the silhouette of the stick raising said hat!

Literature

An exploding cigar is used as a murder weapon in Instead of Evidence.

Live-Action TV

An exploding cigar packed with a lethal charge of black powder was used as a murder weapon in the CSI New York episode "Child's Play". It showed the guy's jaw blown off.
In a reference to the attempt on Fidel Castro's life by the CIA, the exploding cigar was tested as one of their weapons in the "KGB vs. CIA" episode of Deadliest Warrior.
Occurs to Statler and Waldorf on The Muppet Show when they discuss explosions.
On How I Met Your Mother, Barney uses an exploding meatball sandwich as a means of getting back at Marshall. However, he spent months perfecting it since the early versions tended to blow the heads off the test dummies and Barney is not that evil.
A variation on Get Smart; An episode featured gadgets known as "Bazooka Butts". You light it up, take one puff and throw it at your target. (Two puffs would blow your head off.) It came in a pack where half of the cigarettes were Bazooka Butts, and the other half were real cigarettes. They were completely indistinguishable from each other.
In an episode of M*A*S*H the camp is visited by an old friend of B.J.'s who is an incorrigible practical joker. As he leaves, he offers B.J. a cigar. B.J., anticipating this trope, takes the cigar out of the man's mouth instead. He responds with "Come on, an exploding cigar? That's kids' stuff" and leaves. A short while later, the cigar explodes.

Newspaper Comics

Dilbert tries these at one early point. Dogbert tries to tell him that they're meant to be given to other people, but Dilbert responds "It's too late, I'm hooked."

Radio

In The Goon Show (which is, after all, a kind of audio cartoon), sticks of dynamite will frequently get mistaken for candles or cigars. Usually it's Bluebottle who gets hurt by them. Just occasionally they'll invert the gag by having somebody pretend the dynamite is a candle or cigar. Guess who comes off worst in those situations as well?

Real Life

The CIA actually tried to do this in one of its innumerable attempts to assassinate Fidel Castro. It failed, like all the other attempts to kill Castro.
Dave Barry remembered a practical joke called a "load", a chemically-treated sliver of wood that was pushed into a cigarette and exploded when the fire reached it. "Everyone had a great laugh except the smoker, who was busy wondering if his heart was going to start again." Barry decided that it would be a much more effective way to make people quit smoking to put a load into one in 20 cigarettes.
- Unsurprisingly they're still available.
Sold back in the day by the DeMoulin Brothers, makers of fine and disturbing Initiation Ceremony paraphenalia.

Video Games

In Day of the Tentacle, you have to give George Washington an explosive cigar so that you can swap out his dentures with a pair of chattering teeth (It Makes Sense in Context).

Webcomics

Freefall used them in a story arc starting here.
In this Palindramas strip, it's Played for Drama. Sort of.

Western Animation

Looney Tunes:
- In "Ballot Box Bunny", Bugs Bunny, campaigning for mayor, is giving away cigars to the voters. Yosemite Sam commandeers them, whereupon Bugs substitutes a box of exploding cigars for them. Hilarity Ensues.
- "Rabbit's Kin" has Pete Puma offering an exploding cigar to Bugs. Bugs, knowing a trick cigar when he sees one, puts it away and then pulls the old "one lump or two on your tea" gag on Pete (a Running Gag in the cartoon), after which he gives Pete his own cigar and lights it for him.
- In another cartoon, Bugs Bunny gives the Tasmanian Devil a bomb in a blanket, telling him it's a baby. Taz gives Bugs a cigar, which explodes in his face shortly after the bomb does, leaving Bugs to muse that maybe Taz isn't as dumb as he looks.
In Bacall to Arms, directed by Bob Clampett, the wolf steals a cigar, and Humphrey Bogart shoots him dead and smokes it-— and it explodes (naturally), turning Bogey into a blackface caricature who says in an Eddie Rochester voice, "My oh my! I can work for Mr. Benny now!"
A Tex Avery MGM Cartoons, Wags to Riches (remade in the 1950s as Millionaire Droopy), has Spike trying to kill Droopy by offering him a regular cigar while the gas line is open. Droopy can't get the lighter going, so Spike lights it for him and BOOM! (Droopy, of course, is gone by then.) Frustrated, Spike decides to smoke the cigar anyway. It explodes. And then the lighter explodes.
Rocky and Bullwinkle had Bullwinkle handling what he believed to be a "Dee-na-mee-tay" brand cigar.
- In an Aesop & Son cartoon, the jackrabbits who are digging for gold constantly give the mule, who runs the water shop, explosive cigars for water.
Ed, Edd 'n' Eddy: in the Christmas Episode, while Eddy is searching the closet in the beginning, there is a box labelled "exploding cigars".
Happened to Fred twice on The Flintstones:
- The first time, it was given to him by an annoying duplicate of himself; Fred suspected it was a gag cigarette, and swapped with the duplicate. Unfortunately, that resulted in Fred getting the loaded one.
- Another time, a rowdy, jovial friend of his gave him a cigar at a party:

Fred: Naturally, this is one of those -
BOOM!
Fred: -exploding cigars!