For several years before I was diagnosed with sleep apnea and started using a CPAP machine, it was a common joke with my wife and kids that I would only see the opening and closing credits of any movie...if I sat down for any length of time, especially in a dark room, I would go to sleep. The final straw was when I started going to sleep while driving! Since using the CPAP machine, I now sleep normally, and I can actually watch movies from start to finish.