I've never heard of this actually happening, but with all the strange stuff popping up that young adult are willing to try, I would be afraid of a teenager, having some friends over for a round or two on the PS3, wouldn't think twice about dumping a 30ml bottle of 24mg/ml BubbleGum flavored juice into a 5 hour energy drink. His friends would only notice they were winning the game, not that their homey had dropped dead.
Wouldn't happen, right?
Nobody would mix caffeine and nicotine would they?