My worst would have to be when I was a bit off the beaten path. Got out of my vehicle with my GPS'r and shut the door only to see my key in the ignition, my cell phone and wallet on the seat, and the doors all locked. No hide-a-key for entry. Noticed a nice piece of stout chain on the ground, picked it up and one good swing later the front passenger window was gone. Drove home in the rain and ordered a new piece of glass the next day. At least I already had the experience of replacing the window regulator motor, so the glass replacement was easy enough. I can assure you that adventure won't happen to me again!