Jason Voorhees tries pre workout for the first time on Dr Loomis' orders. C4 Preworkout gives you the energy you need to go on a hilarious killing spree at Crystal Lake. Or it could be used by Michael Myers psychiatrist Dr Loomis to tame the rage of Jason Voorhees, Friday the 13th mass murderer. Watch Jason react to the effects of C4 pre workout supplements when Pam Voorhees isn't around to save him.