 Yeah, I would imagine, like, I almost did it because physically I was having trouble keeping my eyes open. But if you decide, you know, I'm a little bit beat up, I'm going to take a nap in my car, I would imagine that can't be the most comfortable sleep. I would imagine unless you really don't give a damn or you're not afraid at all that somebody's going to come and get you, or you live in an area that is totally safe, I would imagine it would be pretty tough to achieve REM sleep in a car.