If you're at all nervous about cunning and dastardly terrorists circumventing airport security then you probably shouldn't watch this video.
An American chap has clearly demonstrated how to build a shotgun with items available after airport security.
The gun - made from batteries, a deodorant can, hairdryer and various containers - can shoot $1.33 in small change through a drywall.
The man behind it, Evan Booth, said: "If we're trying stop a terrorist threat at the airport, It's already too late", he told FactCoexist.
Fortunately Mr Booth isn't an evil terrorist but a programmer and "security researcher" who sends his findings to authorities before posting them online.
Even more terrifyingly, the BLUNDERBUSSness Class isn't the only weapon he's made.
There's a crossbow and a scary-looking spiked club too (see videos below).
Recently the main concern for similar weapons has been the threat posed by 3D-printed weapons - but perhaps thais has been misplaced.