The same sh** happened with me but wasnt bad crank seals, we had dirtbike grips on the blasty and the throttle got stuck, was a scary sight by the way we had a fresh topend also! but staid stuck for a good 3.5 seconds. we hit the killswitch and did not work so we choked it and turned off, still have bad feelings about it so i keep the idle low, and bought new grips..