Facebook Bet
Two friends fight with a bet. The loser doesn't pay cash. They get stuck with a friend's face as their profile picture. It's picked from the top left of a 2 by 3 grid of friends. They have to keep it for a while. One refresh gives them a second chance to escape.
My brother bet me $10 I'd fail my science test. I failed and now he has my little brother's face as his profile picture. That kid's face is a mess.
My friend bet me I'd stay up all night. I did and now he has my grandma's face as his profile picture. That's like a ghost.
I bet my sister $5 I'd eat a whole cake. I did and now she has my cat's face as her profile picture. That cat is a monster.