Crash Into Hello/Playing With

Basic Trope: Two love interests meet by physically colliding into each other.
 * Straight: Alice and Bob meet by crashing into each other while both are running to school, and later fall in love.
 * Exaggerated:
 * Alice and Bob crash into each other with enough force to put both of them in the hospital. Both instantly fall in love with each other.
 * Alternatively, Alice crashes into Bob with a freakin' parachute.
 * Justified: Alice and Bob are involved in some activity (such as skiing) in which crashing into other people is fairly common.
 * Inverted:
 * Alice and Bob, despite the foreshadowing, step out of each other's way at the last second and go on about their separate lives and plot threads without so much as ever being in the same place again.
 * Or the crash is their last meeting.
 * Or they meet in a normal manner, but crash into each other when they leave.
 * Subverted:
 * It looks like Alice will crash into Bob, but Bob dodges.
 * Or Bob and Alice crash into each other, and, due to the horrible first impression, each thinks the other is a careless jerk, and, instead of love interests, become enemies.
 * Or Bob and Alice crash into each other, but then never see each other again.
 * Double Subverted:
 * Bob, thinking he was safe, fails to pay attention and crashes into Alice anyways.
 * After being enemies, they fall into a Slap Slap Kiss routine.
 * Bob and Alice meet each other later and fall in love.
 * Parodied:
 * Bob is a superpowered Love Interest magnet which draws everyone (girls and guys) into colliding with him, and builds his Unwanted Harem this way.
 * The Lonely Hearts Club meetings consist of lines of guys and girls charging at each other wearing football helmets. While their band plays
 * Deconstructed: The Crash Into Hello meeting causes injuries to Alice that she resents Bob for, and for which Bob feels guilty about and responsible for.
 * Reconstructed: Alice and Bob work out their resentments and fall in love in the process.
 * Zig Zagged: Charlie and Carol are walking down the street together when Alice and Bob each crash into one of them.
 * Averted: Alice and Bob meet in a manner that does not involve collisions.
 * Enforced: "We need to have Alice and Bob meet each other somehow... let's have them run into each other literally."
 * Lampshaded: "Did a cute girl really just run into me? I thought that only happens in fiction!"
 * Invoked:
 * Alice purposely introduces herself to Bob full-force.
 * Alternatively, Charlie and Carol think Bob and Alice would be a cute couple, and decide the best way to facilitate them hooking up would be to push one into the other.
 * Defied: Bob notices a girl about to run into him, and dodges to avoid an unnecessary addition to his Unwanted Harem.
 * Discussed: "You really think you'll meet that special someone by waiting for a girl to crash into you?"
 * Conversed: "Ah, there's Alice, Late for School, and Bob, not paying attention. Collision in 3, 2, 1..."

Look out or you're gonna run into Crash Into Hello! ...Too late.