I managed to lock my keys in the boot. I'd just laid them down for a moment while I put my walking boots on, then I slammed the lid shut before I realised I hadn't picked the keys up. I'd already locked the rest of the car, so I couldn't even gain acces via the back seat.

I had to borrow a screwdriver from another guy in the carpark and hammer it into the lock barrel to open it. It cost me about £50 to get a new lock fitted. :o(

The sooner cars use biometrics instead of keys the better. Quite difficult (though not impossible) to lose a fingerprint. ;o)