>>2392795It's a fun sort of theme. Let's see if I can think of any more.
A few girls are taking pictures and one of them is having a little nipple slip. Her friend notices and joins the group, sitting in front to block the exposure. But then another friend notices and wants to join too, sitting in front of both of them with her legs carelessly open and giving the camera a shot up her skirt or shorts.
At a pool party, one girl dives in and doesn't notice when it makes her bikini top slips down a little. So her friend notices and gets in to warn her and help fix it, and when one of their other friends sees she eagerly dives in too, and her bikini completely falls off.
A girl is doing her routine at the big gymnastics competition when her leotard starts to tear. Her friend notices and quickly stops the live broadcast before the crowd can see anything. Afterwards they check the leotard and realize it's been sabotaged. Meanwhile the rest of the team, not realizing any of this because the broadcast was stopped, start their group routine and all their leotards completely rip open.