actually joel it's proven (by me testing it out on myself) that if you take a seriously large overdose of caffiene you go hyper for around two hours (can even get the jitters like on speed) and then you burn out and fall asleep ~ The testing area for this was a night out clubbing after no sleep since the previous night in the pub I was tired but there was a band playing live I wanted to see so forgoing my alchohol I brought 150 Pro plus caffiene tablets (50mg of caffeine each) and two cans of redbull I took all of the caffeine and then went in to the club hyper active stayed awake until 11 then fell asleep 10 minutes before the band played got woke up when it closed by a mate who found it hilariously funny that I'd slept throughout without being molested with a marker pen, I guess that was to do with the girl on my lap also asleep, who was hot and I didn't know her name but apparently we pulled...Meh