Jaws in Reverse

If you watch "Jaws" backward, it will be a heartwarming story about a shark who gives arms and legs to disabled people.

Explanation

The humor comes from the absurd idea of watching the movie 'Jaws' in reverse, where the shark, instead of taking limbs, would be seen as giving them back. This twists the original narrative into something completely opposite and heartwarming, which is funny because it's so unexpected and ridiculous.