Downplayed: Bob brushes Alice's breast in passing, and she gives him a dirty look.
Justified: Bob is known as a Casanova Wannabe, and he's recently been playing the Accidental Pervert on a suspiciously frequent basis. This is the second time he's done it to Alice today, and she's fed up.
Bob thinks Alice tripped him on purpose, and accuses her of being a pervert.
Subverted: "Whoa... Oh, don't worry Bob... you can trip up on me ANY time."
Double Subverted: Bob, encouraged by the come-on, gives Alice a playful squeeze. THEN she slaps him.
Parodied: Bob trips, and steadies himself on Alice's shoulder. Noticing the chance he just missed, he switches hand-holds.
Zig Zagged: Bob falls and momentarily grabs Alice's breast. He immediately gives her a grovelling apology, but she laughs it off. Later she sees him do it to another woman, and her suspicions are raised. She calls him out on it, and when he still denies everything he gets a Megaton Punch. Feeling guilty, Charlie admits that he's been following Bob around tripping him into women in a Genre Savvy attempt to pitch his unsuspecting friend into a Meet Cute.
Averted: Bob holds his hand out to stop Alice, his arm chastely across her upper chest.
Enforced: The authors want to lay the groundwork for a Slap-Slap-Kiss relationship, but Alice has no reason to either be angry at Bob or think he's attracted to her.
Lampshaded: "Why is it that our boobs are always the first things you grab for?" "Well, guys are the Jason Bourne of boobs. We always subconsciously know exactly how many are within reach and which offer the best purchase. It's no surprise that we go straight for them in times of panic."