How many movies have J.R. Bookwalter and Trent Haaga collaborated on?

They have worked on 7 movies together! Their first movie together was Killjoy 2: Deliverance from Evil (2002) while their highest rated movie together was Mega Scorpions (2003). They have not worked together since Return to Blood Fart Lake (2012). They are most known for their horror films together.