When,,, you go out plowing snow, get it all done @ 2am, shut the tractor down, check everything over, get out, lock the door, get in the truck and head down the road,,,,,,, after about 10 minutes you think,,,,,, now what did I do with that key,,,,, so you head back and look all over for it,,, and yes there is snow under the machine ( should have scraped that better),,, finally look at the door handle to get in the machine and low and behold,, it's still there,,,,, now how did that happen. and oh,, it wasn't so warm out there either -23 or so with a bit of a wind,,, glad I remembered to leave the truck running while I looked!