What's the weirdest thing you've found in a car?

I found a Mac 10 machine pistol in a case with 3 full clips under the hood of a vehicle we were going to work on.
We found a loaded S&W .45 tucked near the master cylinder of a used car we bought at auction.
At first I thought "finders keepers" but quickly thought otherwise. We called the police and they came and took it. Said the serial numbers were removed. They also were nice enough to have the K9 sniff the car for us afterward. The buyer did a better job of not buying ghetto cruisers after that.