i met a guy who was going through the metal detectors and said "i hope they don't find the bomb" he was pulled aside, they yanked his carry on AND his suitcase, with bombdogs sniffing the rest of the cargo, they searched all of his things, cutting the lining out of his suitcases. they "wanded" him before (this is in another room) carefully strip searching him, going through every article of clothing. they performs a "body cavity check" (bend over) and just to be sure he didn't eat the bomb they x-rayed him. he missed his flight and had to buy a new ticket for a hefty sum.
its not something to joke about, unless its a private plane and your best friend is the pilot. then you can joke about anything