Ahhh, the first step to the beginning of the end of your life!
Just kidding. I wouldn't overreact to the nail in the tire. I found 2 nails in one of my GSC's one time, a key stuck in my 454 pickup tire, a screw in my Firestone. There's a lot of crap out there on the roads and in parking lots and it probably was an accident. It still doesn't make it any cheaper to fix unfortunately.