10 foot tall giraffe
So this guy walks into a bar with his 10 foot tall giraffe. Despite the strange stares from the other bar occupants, they proceed to drink themselves silly.
After about a dozen drinks, the giraffe stands up and then keels over. At this his companion stands up as well, settles his bar bill and starts to walk out of the bar. The bartender shouts, 'Hey idiot, you can't leave that lyin' here!'
But the man replies, 'You're the idiot... that's a giraffe, not a lion!'