Batman: Hey I'm going to disappear for 8 years. Bruce Wayne: Hey I'm going to disappear for 8 years. People of Gotham: Shut up Bruce, we're trying to figure out who Batman is. Batman: I'M BACK! Bruce Wayne: ME TOO. People of Gotham:
Joker and Robin were classmates - Heath Ledger and Joseph Gordon-Levitt as classmates in 10 Things I Hate About You -- That awkward moment when you discover that Joker from Batman and Robin were classmates.