Casually show a butcher style knife, gleaming blade in full view. Roll up ashirt sleeve and then with one swift movement smash the blade down on yourforearm. NO TRICKY MOVES! The blade has penetrated completely through your arm, living flesh sticking to it's edge. The shock begins. Blood squirtson the blade, forearm, table and floor. This is super visual. Looks unbelievably real! Everything is self-contained. The gory blood sequenceis optional.