I wouldn't, I think it would make me more stressful, especially if the coffin was in a place other than my own home. Years ago I heard of float tanks for stress and relaxation. They said you floated in an enclosed tank of water, in complete darkness and silence. It sounded intriguing, but I don't think I would have trusted anyone to do that either. http://www.butterbin.com/lie-coffin-relieve-stress/