* The prank he and Michael Gambon played on DanielRadcliffe during the filming of ''Film/HarryPotterAndThePrisonerOfAzkaban''. While doing the scene of the students sleeping in the Great Hall, they placed a fart machine in Daniel's sleeping bag (which was right next to an extra he had a crush on) and kept pressing the remote during the take.
* In the commentary for ''Film/LoveActually'', Richard Curtis reveals that he told Rickman he read the Harry Potter books to his kids and tried to duplicate the voices of all the actors in the films, but couldn't get Snape right because he couldn't "throw my back into it" enough. Rickman replied, "Don't worry. I don't either."