Curse of Bigfoot (1975)
Beware - not of bigfoot, but of this movie! It's all about some high school kids who go exploring in a cave and stumble upon a mummy. When they remove it, the nasty old thing comes to life and starts terrorizing their small California town. If this doesn't look exactly like a 1970s movie, that's because producer/director Dave Flocker shot most of it in 1958 as Teenagers Battle the Thing. Bigfoot enthusiasts might be appalled, but lovers of schlock might find this feature to be just what they need!