It is very possible. I've gotten close. Red Bull wouldn't do it. It's the taurine that gives energy, not the caffeine. However, with enough, I'm sure that would work too.
Caffeine overdose results in a heart attack. A very, very painful one.
FP
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Last night I saw that beauty queen; she's getting high on Revlon
Malo periculosam libertatem quam quietum servitium.