I'm rummaging around trying to find a mini-USB cable (I know, I know) and in my giant box of bullshit I find a tin that makes some interesting rattling noises. I'm promptly distracted by the tin, and have to open it to find out what's inside.
...turns out: Some canadian loose change, and the fucking ECU plug for my truck, that I spent ages looking for, gave up and bought a new one
This must have been the safe place I put the plug and little bags of pins!