Speaking of original Creature from the Black Lagoon director Jack Arnold — in the same year he directed Revenge of the Creature, he also helmed this sci-fi tale of scientists who create a nutrient-rich miracle food that might eventually save the human race … but right now, it’s just accidentally creating a gigantic tarantula that’s causing chaos all over a desert town. You might have heard of this giant creature feature even if you’re not a fan of the genre, as it has two major pop culture pedigrees — it featured one of Clint Eastwood‘s very first (uncredited) film performances, as a jet fighter pilot, and it is mentioned in “Science Fiction/ Double Feature,” the very first song in The Rocky Horror Picture Show (“I knew Leo G. Carroll/ was over a barrel/ When Tarantula took to the hills”).