A variant of the William Tell is the man plays the final and he must catch his girl and screw her before the song is over.
Guy2: Did you win?
Guy 1: Nah, I blew my wad with about 10 seconds left.
B: I put on the finale of the William Tell overture. My wife knew what was coming and she tried to run away. I caught her and fucked her before the song was over though so I won.