Dumbest newbie thing,you did at the drag strip.....

Went to the track with one of my old sport bikes. Have this habit of ALWAYS shutting the gas off at with the petcock. Bike was parked in the staging area for a few minutes so the valve was shut off. Fired the bike up, did a small dry burnout and pulled into the beams. Accidentally rolled thru the beams in my frantic attempt to get it turned back on....