In the free iPhone game, Highway Rider, the point is for you (the rider) to zoom down an endless stretch of highway passing cars as close as possible. Every time you pass closely by a car, your close call meter goes up with some words of encouragement, as well as increasing your speed.
The fastest you can go is 160 mph+. At that point your close calls should be racking up..until you inevitably crash. Crashing in this game is the funniest thing I've ever seen in ANY game. Your rider gets thrown off like a rag doll and tumbles to a halt. You then get a list of injuries as well as your final medical bill.
Tip: Ride in between the lanes along the middle line to avoid the most cars. You won't be 100% safe from crashing but it's the best I've seen so far. Cars switch lanes but not often. The shoulders aren't very safe to ride on because occasionally there will be construction. Riding along the middle will not only keep you safe (kind of), but you'll get close call bonuses from both lanes.