"Hey, I could probably build some pretty interesting weapons with this stuff," is the type of dangerous thought Evan Booth thinks to himself while wandering around airport shops, which has resulted in this -- a crossbow built from umbrellas, straws and dental floss bought on the secure side of the gate.
Booth's site Terminal Cornucopia sets out to answer the question "Can common items sold in airports after the security screening be used to build lethal weapons?" a question that, at time of writing, hasn't resulted in him being chucked into Guantanamo Bay for an indefinite, meals-included holiday.
The US Transportation Security Administration was "surprisingly receptive" to Booth's ideas, although there was that funny time when the FBI turned up at his house to ask a few questions about his plans for improvised airport weaponry. [Wired]