This did not happen to me, but I know someone who left there bag on top of their car, and well, you know the rest.
Oh no, that's awful - I have nightmares about just this.
This thread is for me... most of my lost disc stories are so damn lame. I shall be king of lame lost discs.
Putting practice, I set up my skillshot in a gravel pit (a small, narrow pit, high ridges on 3 sides, I putt from the 4th side) 4 putters enter, my Wizard doesn't make it back - I threw it on an anny around a gravel pile, I watched it catch an edge and cut roll to the left, nowhere to be found.
Russelville Arkansas. After surviving nearly all 18 holes without losing a single disc in the water that is *everywhere* I am tossing my approach shot on hole 18 - my dart lands just to the right of the basket. I pick up my champion boss from my feet and lob it towards the basket as a "practice throw"/victory toss. Boss hits tree and falls into the water. I strip down to my boxers and swim for 20 minutes, only result is an 156 R-Pro boss, kind of an even trade I guess... boss for a boss.
Somewhere outside of Little Rock. Champion x-out teebird, driving practice into a milk carton (don't ask) griplock sends disc on a huge s-curve into small pond - this one is not even on a course, I doubt it will ever be found.
I'll stop there, I'm embarrassing myself.