I'm pretty good at losing things while hunting. I have to tether everything to myself these days, and I still manage to lose things. These are the 3 worst:
1.) Vortex Viper HD 10x42. I was standing next to the truck watching my wife stalk a pronghorn, alternating between binos and scope. I had unclipped my binos tether to make this easier, opting to set them on the hood of the truck. During the excitement of her getting one, I threw the scope back in the case and grabbed my pack to come help. No idea where the binos went. Drove over a metal pole on the way out and lost taillights. Drove back the 4 hours 3 days later but could not find the binos.
2.) Practicing shooting my wife's muzzleloader at a BLM range the night before an archery hunt. All her muzzy loading gear was in a fancy pack. Drove off without it. Oh yeah, her very nice rangefinder, knife and tags were all in that pack, too.
3.) I bought a Remington 770 cheap from a friend getting out of hunting. Lost the bolt while climbing through brush. Sent it in for repair and they wanted to charge me 3x what I paid for it originally. Told them to recycle that garbage.