Four friends are attacked by a demon while on a picnic, due to possession of a tome of mystic information. This amazing amateur film from 1970 by filmmakers who became some of the world's most renowned visual effects artists (Dennis Muren worked on films including Star Wars, Jurassic Park, Close Encounters, and more), packs some serious Lovecraftian punches. There's a tome of forbidden knowledge that opens portals to other worlds, through which awesome stop-motion creatures emerge, including a giant ape-like creature, a flying demon, and a tentacled monstrosity. It even features Fritz Lieber Jr. (Lovecraft circle author and writer of Night of The Eagle) as the doctor who studies the book, and Forrest Ackerman as the voice on the tape.