Getting arrested at 18 for trying to steal a monkey from the local zoo with my friends.
I came back from the UK for a week, partied with my friends before I left again, drank all night/all day and ended up at the zoo to finish the party.
Man, day drinking is a b!tch. But it didn't go further, nobody pressed charges so we're good. So many good memories from those 24 hours, we even took selfies with the monkey using our digital cameras (2008 was wild)
Oh and the obvious "making out with random people"/"waking up somewhere unknown"/"waking up in someone's bed". But everybody does that drunk so that doesn't count.