In my past experiences with people at parties; Alcohol and uppers often resulted in people that could not remember what had just happened. I had a hard rule to stay away from people that mixed alcohol with cocaine or mixed LSD with PCP. The first group could remember nothing and the second group were prone to uninhibited violence. Two unteachable groups.
Yeah- I really never understood the draw of a red bull/vodka drink. When I was a club-hopper I'd drink a cappuccino or two before I did my rounds, then I'd dance the rest of the night. I only use the "energy" drinks when I'm traveling and can't do coffee anymore.