Vaudeville Hook

Real Vaudeville shows would Drop the Cow on bad or overly long acts with "the hook", a shepherd's crook extended from offstage to pull away the performer. But in cartoons, you don't even need to be on a stage to get the hook. Any bad performance can get the hook, even if you're performing on top of a fence - it just reaches out from Behind the Black and drags you offscreen. Wearing a red-and-white vertically striped shirt and a straw boater makes you especially susceptible to this, as does dancing while holding a cane. Spending a while dodging the hook, continuing to perform all the while, before eventually getting snared is a common feature.

Though he didn't originate it, the hook is forever associated with "Sandman" Sims, a tap dancer who would use the hook on bad acts at the Apollo Theatre.

Compare Getting the Boot.

Examples of Vaudeville Hook include:

Film

In Who Framed Roger Rabbit?, this happens to Donald Duck and Daffy Duck in the Ink-n-Paint Club. After several minutes of trying to sabotage one another's piano playing, Donald fires a cannon at Daffy's piano, flooring his own and destroying Daffy's. Both of them, along with their pianos, are dragged off-stage with hooks.
In the new The Muppets movie. One of these is used to grab most of the other Muppets during the montage.
Mentioned as part of an Incredibly Lame Pun in the song "Shiny" from Disney's Moana:

Well, well, well. Little Maui's having trouble with his look
You little semi-demi-mini-god...
Ouch! What a terrible performance -- get the hook! (Get it?)

Literature

A vaudeville performer (complete with fez and revolving bowtie) gets pulled off of an illustration by a vaudeville hook in the Murderous Maths book Desperate Measures for the joke "Why isn't my nose twelve inches long? Because if it was it would be a foot.".

Live Action Television

The Muppet Show: Deployed in several episodes, including multiple times during the episode that showed the audition process for the show.
Referred to on The Daily Show in 2004 when, after winning the Oklahoma primary, Wesley Clark said, "Oklahoma is OK by me!"

Jon Stewart: Clark then added, "Idaho, Alaska!" before becoming the first candidate in history to be yanked off stage with a cane.

Whose Line Is It Anyway? (the American version) has a slight Running Gag of Colin Mochrie carrying a joke for "Scenes from a Hat" a little too long, at which point Ryan Styles will come over and gently usher him off center stage.

Newspaper Comics

Garfield: Garfield sometimes gets the hook when he's doing his fence act.
- Once, when he gave a Christmas Special, a candy cane was used.
One Farley strip, when Bruin Hilda was running for mayor of San Francisco, had the beaver sing a campaign song (to the tune of "Saw Her Standing There". Hilda is thinking "Get the hook".

Video Games

Fiendish Freddy's Big Top O'Fun, when five objects are dropped during the juggling act.

Western Animation

In extras of Shrek 2, there's a American Idol-esque singing contest, and Captain Hook, while playing "Hooked on a Feeling", is removed from the stage in this manner.
Happens to Donald Duck in shorts like "Orphans' Benefit" and "Mickey's Amateurs".
Futurama: Zoidberg is doing stand up at the Apollo and gets the hook. He tries to avoid it only to have another one whack him in the head and pull him away.
In one episode of Batman: The Animated Series, a disguised Joker shows up on stage and starts performing at a stand-up comedy competition - right as the judges are about to announce the winner. He gets pulled off stage with one of these on the grounds that since he hadn't registered as a participant, he had no business being there. A year later, Joker steals some mind control chips from the Mad Hatter, uses them to turn the judges into third-rate supervillains, and arranges for himself to be the only contestant in that year's competition - with his henchmen as the new judges.
In Quest for Camelot‍'‍s If I Didn't Have You song, there's a part where a line of eggs with dragon feet sticking out dance across the screen. They are promptly yanked off-screen.
Bugs Bunny, of all people, gets the hook after his first big break flops in the "Biopic" short What's Up, Doc?