Originally posted by Cory, this is from 1969 and involves helium balloons. The vocal effect, however, was accomplished not with vocal cord-tightening gas, but Chipmunk-style—with threats and coercion, perhaps.
Accordingly, I slowed it down to reveal the original, nightmarish, vocal recording.
JUST. FOR. THE. FUN. (Monster approaches) [Thanks, Heather!]