I've "lost" two enduras:
The first one was "lost" for about 2 days. I was quite miffed that I'd lost it so I went and bought a new one (besides, I felt "naked"). The next day I was running from my car to a friend's house (it was raining!) when I heard a clatter on the ground so I stopped to pick up my knife and re-clip it to my pocket, but there was already a knife there! Turns out the "lost" endura was "lost" inside my over-full jacket pocket (I checked in there, I swear!)
The second one was "lost" (this was the replacement for the first one, lost above) one evening as I got out of my car. I got up after sharpening a machete and noticed it missing. So I started looking around the house, then grabbed a flashlight to look by the car (again, it was raining and nasty so vis. was poor). Couldn't find it so I cursed and swore at myself a bit. Then I went to go to Aikido, sat in my car, and felt something on my back. Turns out the endura had transferred itself from my pocket to some loose threads on the back of my jacket and had been hanging there all night (and I'd even gone out to grab a snack in that jacket and not noticed it).
Hey! My jacket is a dirty rotten knife thief!
Pierre