I know this sounds random, but I took some about an hour before I left work the other day. On the train on the way home, somebody tried to pick a fight with me. Often times, I would get very "shaky" from the experience due to the stress of it (not that I'm scared of the person, just that the flight or fright hormones kick into gear, and my body gets so flooded that it gets a little "shaky feeling" although I would not visibly shake). Anyhow, I did not get that feeling whatsoever and I actually had a calm and clear headed feeling. Perhaps this would be a good supplement to take before a fight... MMA fight or some other match that is. You can't really time a street fight, but a planned fight, you can time fairly accurately.