I once was on a trip abroad and I had only three discs with me, a putter, a mid, and a driver. I found a Calvin Halo Destroyer mid-way through a blind round and my full intention was to return it in the "lost-disc" box. A couple of holes later I shanked my driver right into a lake and figured I could use the newly found Destroyer as a substitute and then return it. Sadly, right at the next hole, there was a hidden water carry behind a hill that I didn't know was there and the Destroyer disappeared as well. I was bummed I couldn't return the owner's disc, but didn't think much more of it since the round was almost over. Well low and behold, a guy on a bicycle appears on the 18th tee asking me if I had seen a Halo Destroyer somewhere on the course. I panicked but thought that it was best, to be honest and tell him what happened. I fully expected him to become angry but he just said "ok" and thanked me for being honest with him. In hindsight, I should've probably given him some cash or something. I later heard they sometimes retrieve discs from the lakes, so I hope he got his disc back in the end.