As you probably know, Toy Story and its follow-up Toy Story 2 sparked the transition from studios using traditional animation to the current state, where most animated movies are produced using computer animation. Computers are great, but there’s one problem with them: they frequently rebel against their human masters and delete everything you’ve been working on.

Now we’ve all lost a spreadsheet or document, but what if you lost an entire movie? Turns out that almost happened during production of Toy Story 2, as Pixar’s Oren Jacobs and Galyn Susman recount below (as you probably figured out by the fact that Toy Story 2 exists, the movie was not actually deleted for good):