Meatcleaver Massacre

When Professor Cantrell, a specialist in the occult, embarrasses one of his students, he must pay the price. Mason Harrue, the slighted student, recruits his friends to go on a killing rampage to destroy Professor Cantrell and his family. But, Cantrell doesn't die, and he summons a demon to avenge the deaths of his family members. The murdering students attempt to flee, and for some strange reason we never actually see a meatcleaver.