How many hours of sleep do you usually get a night during semester/holidays/summer? I believe it was Benjamin Franklin who was able to manipulate REM(Rapid Eye Movement Sleep) and function off of 2 HOURS OF SLEEP A DAY!!Thought that was pretty cool. For those of you that do not know what REM sleep is, it is when the body is actually recharging itself so to speak and lasts for about 90-120 minutes. But it takes about 2 hours to actually get into the REM stage, but Benjamin Franklin was able to do it much quicker.