And then once you know the probability distribution, then you can figure out what's the probability that 100 cars pass in an hour, or the probability that no cars pass in an hour, and you'd be unstoppable. And just a little aside, just to move forward with this video, there's two assumptions we need to make, because we're going to study the Poisson distribution. In order to study it, there's two assumptions we have to make, that any hour at this point on the street is no different than any other hour. And we know that's probably false. During rush hour in a real situation, you probably would have more cars than in another rush hour. And if you wanted to be more realistic, maybe we do it in a day. Because in a day, any period of time, actually, no, I shouldn't do a day.