- Acclaimed Flop: Currently Adam Sandler's second best reviewed film (beaten in 2017 by The Meyerowitz Stories), yet didn't even make back it's $25 million budget
- Actor Allusion: In many ways, Punch-Drunk Love serves as much as a commentary on Adam Sandler films as it does Romantic Comedies. P.T. Anderson referred to it as "an arthouse Adam Sandler film".
- Big Name Fan: Lee Unkrich, Judd Apatow, Barry Jenkins, Bill Nighy, Owen Wilson, Steven Yeun and Taika Waititi have all said that this was one of their favorite films.
- Domhnall Gleeson has said if he could take any role in film history, it would be Barry Egan.
- Playing Against Type: Hard to imagine an actor who's known for low-brow comedy is a star role in a rather serious film.
- Playing with Character Type: Adam Sandler's character is, like always, antisocial, emotionally immature, and prone to uncontrollable fits of anger. Instead of that being a source of comedy, it leads to awkward, embarrassing situations, and the character leads a lonely, depressing life. Roger Ebert discussed this in his review of the film.
- Throw It In!:
- Barry's line, "Business is very food" was a typo which P.T. Anderson decided to leave in when filming.
- The effect of the camera suddenly jumping to an out-of-focus shot and then quickly refocusing came about when the steadicam being operated bumped into a table.
- What Could Have Been: Sean Penn was originally going to play Dean, but had to drop out.
Trivia / Punch-Drunk Love