I have a 50% chance of taking a step to the left. And I have a 50% chance of taking a step to the right. So your intuition there is, if I told you I took 1,000 flips of the coin, you're going to keep going left and right. If by chance you get a bunch of heads, you might end up really kind of moving over to the left. If you get a bunch of tails, you might move over to the right. And we learned already that the odds of getting a bunch of tails, or many, many, many, many more tails than heads, is a lot lower than things kind of being equal or close to equal. And right here, what I've done, this is the mean number of left steps.