When a running back jumps the snap count, do you allow him to reset and let the play go off, or do you kill the play and call a foul for a false start? Redding's says this is "most likely" a false start, but goes on to say "there is no general agreement among officials about what constitutes a false start by a back or split end."
For clarification, when I say "jumps the snap count" this is clearly not a shift, but a quick movement in the direction he would have gone at the snap, followed by another quick movement back into a three point stance.