Simply confess stupid stuff or things you regret. E.g: "I clogged a public restroom!" "I made out with my dog for practice!" "I once kicked a live chicken :(" "I hate bunnies!" And much more. Mine: I accidentally told a classroom with 5/6 year olds there's no Santa...
I can eup to a girl and slam dunked her boobs and blamed it on a nerd and he got suspended for 2 weeks. ):