Not yet, knock on wood, but I've come close. I did however leave a pair of binoculars in the middle of nowhere Casper Wyoming once upon a time. We (my cousin and I) were hunting Mule Deer and Antelope and did not carry water (young & dumb), after thirst got the better of us we drank water from depressions in the rocks and I set down the binoculars to take a drink and left them there. We hiked back next day and we found those binoculars sitting where I left them.
