Mark Martin walked away unhurt from an unusual and frightening crash Sunday while he was leading the Pure Michigan 400. Martin had led most of the race when he was coming up on cars in front of him that he was about to lap as he exited Turn 4. A moment before Martin reached them on Lap 65, Juan Pablo Montoya got under Bobby Labonte's car and caused Labonte to spin. Read more: http://espn.go.com/racing/nascar/cu...ark-martin-t-boned-pit-entry-barrier-michigan
