Rather than use the reactionary modern knee-jerk method of
threatening the bloke with assault, battery, lawsuits etc and
whatever other legal recourse is used because of the severe
injuries you have brutally and viciously received from all this
hand-slapping, have you ever considered to simply and nicely
ask him to stop doing it?
It might come as a cultural shock but that's what we used to
do in Oz once, often with positive results.
I know its quite old fashioned and outdated and does not fit
anywhere into the modern 2012 mentality, but give it a try -
the result could be surprising. You might even consider using
a 2012ish method of CRM "Conflict Resolution" assuming you
weren't asleep in the classroom during that module.