One of John Goodman's first movie appearances. He plays a Cop in the diner
Was part of Jordan Peele's inspiration for his 2019 Horror movie "US" and a VHS version of C.H.U.D can be seen in the movie.
In 2011, as an April Fool's Day joke, the Criterion Collection, the USA's most prestigious distributor of home video, announced that it was releasing a special-edition DVD and Blu-ray Disc of the film with spine number 573. It was later assigned to The Music Room (1958). C.H.U.D. did however receive a special edition Blu-ray release from Arrow Video in 2016.
The original concept art of the C.H.U.D.s (featured in the still gallery of the Anchor Bay DVD release) shows that their faces looked more animal like in appearance.