The rumor: It's possible to get caffeine poisoning As he was driving down an Ohio freeway minutes after swallowing five Magnum 357 caffeine pills, Christian Brenner started to vibrate -- and the cars in his rearview mirror did as well. Fortunately, Brenner pulled over and walked around in an effort to try and come down. Today, he swears off caffeine, even coffee -- the mental aftereffect of what he says was straight-up caffeine poisoning. The verdict ...