Some 25 years ago, I was on booktour for Cuckoo's Egg. I visited Iowa City and spoke at Prairie Lights bookstore -- delightful people and a wonderful place! A haven for writers, readers, and hackers.
After my talk, I passed along a Klein bottle to an Iowa computer hacker who was fooling with unix. In turn, he gave me a Corn Grenade . I tossed it in my backpack, headed for my next stop, and next evening went to Ames Municipal Airport.
This was in pre-TSA days, but there was certainly airport security: the security guy at the Ames airport discovered the corn grenade in my carry on. Happily, he recognized what it was - a cool, brass, art sculpture which was completely inert. By that time into booktour, I was pretty inert. We chatted for a few minutes, and I took the commuter plane to Chicago.
I'd forgotten about my 3 pound brass friend when the plane landed at O'Hare. But the Chicago X-ray scanner found it, and all sorts of alarms went off. Natch, I was taken aside, given the third degree. Seems that corn grenades aren't recognized in the distant lands of northern Illinois. I had to explain all about corn grenades (and my book, and klein bottles...) Missed my flight, slept overnight in O'Hare, and wound up shipping the heavy lil' guy by UPS ground. Today, that brass ear of corn smiles at me from across my dining room, reminding me when I got hacked by a computer jock in Iowa City...