Re the Red Bull thing....I tried some for the first time two weeks ago during a long ride while going on vacation. I was driving, felt tired, stopped at rest stop and saw some and bought a bottle. To my surprise, it seemed to work. Didn't make me feel speedy or anything, but about a half hour after I drank it I was awake.
I tried it again on the way back. Same thing. Now I was curious. Can this really work ? I'm ususally not effected by suggestion so I don't think that was it. But who knows?
When I went back to my office another guy who went on vacation at the same time coincidentally related a similar story to me. I asked him if he thought it was for real. He said he thought so and some friends of his swore by it.
I have a tendency to be skeptical about things like this, but I have to say this seemed to work and I'm interested in other opinions on it from people who have tried it.