FleshEater 4K 1988

A large group of young people go to rest and have fun in the woods. At the same time, a farmer was uprooting stumps with his tractor and accidentally stumbled upon a stone slab. A warning had been carved on the slab, telling him not to touch it. He did not heed the warning and when he removed the slab, he found a real live corpse underneath.

After looking around and snacking on the farmer, the corpse went for food. And food for the reanimated dead is known to be served by living people, and there are so many tasty teenagers nearby...