10 Terrible CGI Horror Movie Moments You Can't Unsee

It's the thought of what could have been that makes this one such a tough pill to swallow, with the atrocious end results The Thing fans were ultimately given being enough to scar them for life.

John Carpenter's 1982 loose remake of 1951's The Thing from Another World, adapted from John W. Campbell's Who Goes There? novella, is one of the most adored horror pictures of all time. Its use of stomach-churning practical effects was utterly mesmerising, and this was actually the route the eventual 2011 prequel to Carpenter's movie was originally set to go down.

However, Matthijs van Heijningen Jr.'s movie about an alien capable of assimilating other lifeforms went through quite a disastrous transformation of its own after poor test screenings. With both the director and producers feeling the picture "looks like an '80s movie" due to the practical effects they'd used, the call was made to cover a lot of said animatronic work with CGI in post-production.

That last-minute change-up led to some of the worst computer-generated action of the decade, with moments like the creature merging with humans and peoples' bodies splitting being embarrassingly artificial and unconvincing.

If not being able to unsee these appalling creations wasn't painful enough, there's actually also footage out there showing fans the wonderful practical chaos they were so close to getting before the creators panicked and went digital crazy.