Did he have no shoes and a dirty old singlet? And was he as bald as a badger?
When I was in high school, one of my teachers told us his uncle actually DID say that. He was going through security and when he passed them his bag, he was like, “Watch out for that bomb in there!” Needless to say, he didn’t make his flight.
(I’m reminded of the episode of “King of the Hill” where they blew up Hank’s Thanksgiving turkey)