yeah, i had that same exact problem about 4 months ago man.. i feel your pain, i drank pry 3-4 big mugs of coffee like the big speedway gas station mugs, but i hadent slept in pry 40 hrs. man.. i just felt like total shit, like i couldent stand or anything, my eyes would be wide open for hours, and you just shake constenly and you just want to sleep it off, but its impossible to do anything but feel like shit. i no longer drink coffee at all, unless it is decafe.