Thunder Run (1985)

Despite having a title very similar to Thunder Gun Express, Thunder Run (1986) does not feature anyone that hangs dong. Well, maybe it does, but they don't hang dong in the film at least. This one's sort of a low rent The Wages of Fear or Sorcerer, where a truck of hazardous chemicals has to be driven through hazardous terrain. One way, and one way only, this improves on all three of those masterpieces is thanks to the butt baring sex scene from Cheryl M. Lynn!