We had a guy years ago in our club get a glider way up high ..he sat down in a lawn chair and watched it slowly circle above.. Another guy sits down next to him and they talk as he flies..He would look at the glider ,look at the friend and talk ..After awhile he gets up goes to get a drink or something and another person at the field says "I thought you were flying your glider?" His jaw drops..he runs back to his radio..nobody ever spotted it..maybe its still up there...