According to Dr Richard Wiseman's 2002 study, Milligan wrote The World's Funniest Joke:
"Two hunters are out in the woods when one of them collapses. He doesn't seem to be breathing and his eyes are glazed. The other guy whips out his phone and calls the emergency services. He gasps, 'My friend is dead! What can I do?' The operator says, 'Calm down. I can help. First, let's make sure he's dead.' There is a silence; then a gun shot is heard. Back on the phone, the guy says, 'OK, now what?'"