Looney Tunes

Needing to get away from hunters, Bugs digs a tunnel and accidentally winds up in Sing Song Prison (a clear reference to Sing Sing Prison). As he tries walking away, prison guard Yosemite Sam beats Bugs with a billy club, telling him, "Trying to pull an escape, 777174, huh?" To which Bugs replies, "I'm not 77174 - I'm only 3 1/2." Sam finds this fine, and soon Bugs is in a prison uniform, breaking rocks, with the prison number "3 1/2" (as Bugs says, "Eh, my mother told me there'd be days like this.")