Gibbs' Head SlapI know that the "head slap" originated one day on set during rehearsal. Michael W. was going on and on ... kidding around ... and Mark H. gave him a head slap to bring him back to the moment. Everyone got such a hoot out of it that it was decided to keep it in the script and let Gibbs use it from then on. My question is: does anyone have anymore information about that day? What was Michael actually doing .. ad libbing probably. Help anyone?