The Original: Jake Gyllenhaal plays the eponymous teen troubled by visions of a coming apocalypse, and stalked by a giant rabbit. Some jiggery-pokery involving a wormhole allows poor Donnie to avert the end of the world, but only after some considerable personal cost…

With Added Doc Brown: This is DB’s modus operandi: helping out-of-their-depth teens get to grips with the basics of time travel. However, with his trusty DeLorean on hand, there would be no need for Donnie to sacrifice himself, as he wouldn’t need the wormhole at all. We think. The end is kind of confusing…

Risk To The Space/Time Continuum: Actually, unless the Doc could somehow cram that falling jet engine into the DeLorean, this wouldn’t work at all. Donnie has to restore the fallen jet-engine to the original universe to avoid a “time corruption” that would cause the universe to collapse upon itself. That’s about as far as we’ll go in trying to pick this one apart!