Have you ever got brain freeze? It's the worst pain you've ever experienced but it's only for just a few seconds. A kid, well two kids at a baseball game have a slurpee race and one of them gets brain freeze really bad.
This video from New Scientist does an experiment to let you know how easily your mind can be controlled. I was amazed at the results because I would have never believed in such a thing. You may be surprised how easily your subconscious can be tricked.