Monsters Crash the Pajama Party is a 1965 American horror short film co-written, produced and directed by David L. Hewitt (Gallery of Horror; The Mighty Gorga). It stars Vic McGee (The Wizard of Mars), James Reason, Clara Nadel, Pauline Hillkurt.
During its original theatrical release, actors would venture out into the seats in costumes as though they were the monsters coming out of the movie screen, similar to The Tingler.
Monsters Crash the Pajama Party was released on DVD by Something Weird Video in September of 2007. The DVD was positively received due to its visually-interesting cover, extensive menus, and abundance of short horror films and clips.
A group of teenage girls spends the night in an old dark mansion as an initiation into a college sorority. The girls all agree to the initiation due to them all not believing in ghosts. Their boyfriends begin to play spooky pranks on them with store-bought masks, which fails to frighten the girls since they had been expecting these pranks.
However, unbeknownst to the teenagers, the building is actually the headquarters for a mad scientist and his hunchbacked assistant, who are experimenting with turning humans into gorillas. The mad doctor abducts the girls, who are later rescued by the boys. The boyfriends then fight off the doctor’s henchmen, a gorilla, a werewolf, and a creature of some sort. Incensed by his monsters’ failure to re-capture any of the girls, he instructs them to blast a hole through the movie screen with a laser gun and venture out into the audience!
It is at this point during the original theatrical run of the film that actors dressed as the monsters from the movie would wander about the theatre seats to scare people, however lightly. The actors often wanted to seem comically spooky rather than actually scary.
Related: Ghost in the Invisible Bikini