Pennies From Heaven
I was traveling with a buddy from Canada, to France. We were big into one card game that required pennies. So my friend, the character that he is, brought a glove full of around 1000 pennies, and without thinking, tossed it in his carry on.
Every security stop we went through, he had to dump out his glove of pennies, and then put them all back into the glove. The first security check we went through, him and I were both staring at the screen, wondering what the heck was in his bag. The way it was placed, it looked like an awkward metal dinosaur.