Manos: The Hands of Fate (1966)

A low-budget horror film made by El Paso fertilizer salesman Hal P. Warren, about a family on vacation that stumbles upon an isolated house inhabited by a polygamous cult. Among its most notorious flaws, besides poor production qualities, is an opening sequence with little dialogue in which the family drives through the countryside for several minutes looking for their hotel. Also, a teenage couple is seen making out for no apparent reason nor with any connection with the plot. John Reynolds, who played the character Torgo, supposedly a satyr, wore a rigging for his legs that made his performance extremely awkward. The film gained cult popularity by being featured on Mystery Science Theater 3000.

It has held the #1 spot on the IMDb Bottom 100 repeatedly. It also has a 9% rating at Rotten Tomatoes, and the one positive review linked on Rotten Tomatoes is for its Mystery Science Theater appearance rather than the film itself (which the reviewer, Mike Bracken, calls “unwatchable”)