I first saw this in the late 90s on a vhs. Revisited it recently aft reading Ba_harrison's hilarious review. This movie is indeed unintentionally funny. The old geezer's/monster's white hair, the girl's out dated undergarments, the end speech and Mongo's face n guts. On a snowy Christmas nite, three convicts break outta prison n they carjack taking two women as hostages but things turn ugly when the car plummets down a mine shaft, trapping all the five fellas down. Well, like they say outta the frying pan into the fire. Unknown to em, an ol Alexander Pearce with snowy hair has been inhabiting the mine. The film lacks tension n the twist is very predictable. The kills r very few n nothing gory, except for the offscreen one. I thot that Mongo the Rubeus Hagrid lookalike will put up some fight man. Cameron Mitchell is totally wasted.