Players use base running stance with the right foot up against the line and at our showcase in late May in GA, they had the laser set up so when his foot trips it, the time starts and when he crosses it after 60 yards, it stops. There was no ready, set, go. They just had a guy standing about 10 yards up who raised his arm for ready and when he dropped it, they go. They ran in pairs with one on each side of the center line set up across the outfield.