So today I decided to clean out my SVX and put my new floormats in it (Okay, so they aren't NEW, they are out of a Prius...) and when I was trying to stuff the back mat under the driver's seat, it wouldn't go, so I reached under there to see what it was, expecting it to be the power seat mechanism, and I found a box thing that I yanked out, and discovered a little flashlight thing with a built-in toolkit. I'm gonna try and dig out the email of the guy I bought the car from and see if he wants it back...
As for weird things, I've never really found anything in a car beyond the "normal" stuff, I did buy an 82 sedan once that had a can of chew pouches that expired in 1986 under the seat. My friend tried one and said it was the most stale tobacco he'd ever had...
Now digging in the local junkyard is a different story, since a lot of their cars are impounds. One car came in with a bunch of needles all over in it, I've found all sorts of weird stuff. one car had like, 5 or 6 porn DVDs in it, and the guy at the counter said I could have the parts I came in after if he could keep it
That was a better deal than the transmission I got out of there for 2 cases of beer!