Funbag Airbag/Playing With

Basic Trope: A character unintentionally faceplants into a female character's cleavage.
 * Straight: Michael is running and not paying attention to what's in front of him. Once he looks forward, he runs into Alice's cleavage.
 * Exaggerated: Michael is running with Super Speed and collides with Alice's Gag Boobs. Alice doesn't budge an inch.
 * Justified:
 * Michael wasn't looking where he was going, and their height is aligned in a way that such a collision is unavoidable.
 * Or, alternatively, Alice INTENTIONALLY got in Michael's path to keep him from into something like a wall.
 * Inverted:
 * Alice, not looking where she's going, runs into Michael.
 * Michael ends up running into Bob's large pectoral muscles.
 * Michael is very short and/or Alice is very tall. Michael runs into Alice's backside.
 * Subverted: Alice appears to be in Michael's path at first, but she sidesteps before Michael can run into her.
 * Double Subverted: ...whereupon the camera pans to show that Michael ran into Carol's breasts.
 * Parodied: Michael gets stuck when he runs into Alice, who is quite well-endowed.
 * Deconstructed: This happens so often with Michael that most women assume he is a pervert, and so they don't want to be around him.
 * Reconstructed: They come to realize he's just clumsy.
 * Zig Zagged: Michael runs toward Alice, who dodges. Michael then turns back and runs at her again, but Alice is flat chested and the airbag effect doesn't happen. Running away again, he almost collides with Carol, who dodges...
 * Averted: Michael runs into flat chested Alice
 * Enforced: "We've been one-upped! We have to turn the Fan Service Up to Eleven! What if Michael runs into Carol's boobs instead of that accidental kiss we had planned with Bob?"
 * Lampshaded:
 * "How the heck do you plant your face in my boobs accidentally?"
 * "They're not exactly that easy to miss, y'know."
 * Invoked: Michael purposely runs toward Alice with her boobs as a target.
 * Defied: Michael always watches where he's going so that he doesn't run into anyone's bosoms.
 * Discussed: "Whoa, Michael better be careful or he'll run into Alice's-" *WHUMP!!* "Too late."
 * Conversed: "How does it never occur to Michael to, y'know, look where he's going?" "And miss an opportunity to be in Alice's boobs?"

Go back to Funbag Airbag, and watch where you're going this time!

as if breaking my nose on your sternum wasn't reminder enough...