I know this isn't the kind of experiment that you're used to. You know, you normally think an experiment is doing something in chemistry or physics or all the rest. But an experiment is every time you run this random event. So one way to think about probability is if I were to do this experiment, an experiment many, many, many times. If I were to do it a thousand times or a million times or a billion times or a trillion times, and the more the better. What percentage of those would give me what I care about? What percentage of those would give me heads?