Stand over height means that your inseam (crotch to floor with about an inch or two of room) over the top bar on a bike when you stand over it without sitting on the seat but standing forward of it and you should have that much room between you and the bike.
Schuyler Croce. Some speed readers and scientist claim that the brain can process as many as 25,000 words per minute, and retain the infomation! Login or Sign Up to answer this question.
I would say 72 hrs is the max. After that your brain starts to overload from lack of sleep and constant chemicals it has been releasing and you lose perception of reality, it's a long hard road for a trip. Or you can read this story. www.time.com... I know from experience though after 3 days, you start to see strange things....