Source: Drive (2011), an American crime thriller film. A wheelman to robbers: You tell me where we start, where we're going, where we're going afterwards - I give you five minutes when we get there. Anything happens in that five minutes, and I'm yours, no matter what; anything a minute either side of that and you're on your own. I don't sit in while you're running it down, I don't carry a gun, I drive. I was wondering if you could explain the sentence in bold to me. What do "sit in" and "run it down" mean?