BMW S1000RR Huge Tank Slapper at Knockhill

I had only been out a few laps and i was just about to up the pace, Full throttle up the start/finish straight and the front end began to lift, The traction control kicked in and acted like Anti-Wheelie, It brought the front end down but it skimmed arcoss the uneven surface and resullted in 120mph tank slapper! Watch at the end of the straight as i reach for the brake and it comes back to the bar!