None of this surprises me (this mans act), which is why I enrolled my wife in self-defense classes, and took my 70lb American Bulldog "Mia" to be police trained as soon as she was ready. People always say they would do this or have done that, but until you are placed in a situation such as the maniac's rampage, you really do not know what you would do. The first thought that came to my mind concerning the old folks ,was ramming their vehicle into the psyco. From previous encounters that have happened to me ,I can tell you that everything s.l.o.w.s.. w.a.y...d.o.w.n. and then the adrenalin kicks in ye-ha!