I'm going to have to disagree with Adam on this. You have to realize the stage beam is the only one in the system that works bassackwards. All other beams have to be broken, this one stays locked with the wheels keeping the beam from reconnecting, if it connects again before green, it's triggers red.
The car can go forward/backward/ or in this case up, and will connect.
Brent; the picture is a little dark, but you can see both cars have hit the throttle, Doug's left front is up, Troy's car have both up over the 2" high beam, so it's reconnected and has nothing to do with the stagger of the front end.