This clip comes from Troll 2, the 1990 cult horror film that became famous for its earnest acting and unintentionally funny scenes rather than its scares. The exaggerated scream stood out because it sounds far bigger than the moment on screen, which made it easy to lift out of context. Shared first as a movie reaction and later as a short audio clip, it spread through reaction videos, edits and meme compilations where overreaction is the joke. It endures because the delivery is instantly recognisable and fits almost any shocking reveal.
About this sound
The drawn-out Oh My God scream from Troll 2 (1990), used as a reaction sound for shocking, hilarious or unbelievable moments in videos and memes.
This is the long, rising Oh My God cry lifted from Troll 2, stretched out until it sounds more shocked than the scene itself deserves. The voice climbs, wobbles and holds the final syllable, turning a moment of horror into something absurd and instantly funny. Played over a clip, it signals that something has gone completely wrong, or completely unexpected, and it makes the viewer brace for the reveal while already laughing. Its over-the-top delivery is what gives it power: it is too dramatic to take seriously, so it works as a punchline, a reaction and a warning all at once.