two college buddy one an uptight nerd and the other a rude slob embark on a road trip through the country . on the way and they encounter a vicious vehicle that look like an army tank combine with a monster truck and that try to run their car over . they escape it and but only enrage the mysterious and dangerous driver more when one of them take a leak in the top hatch while at a rest stop . later on and they pick up a sexy hitchhiker who end up get involve in their life threaten situation . monster man be an extremely entertaining horror comedy that have some good suspenseful moment as well a some good gory one . the two lead character and their constant bickering be fun to watch all on it own and the end take a tcm like turn which be very well do . absolutely worth check out .