History Trivia / Whiplash

** In one scene, Fletcher repeatedly slaps Andrew while making him do a four-count and trying to get him to figure out if Andrew's tempo was too slow or too fast. The actors, after doing a few takes where Simmons only mock-slapped Teller, decided to do one take where Simmons slapped him for real. That was the take they used.
** During the scenes where Andrew and the other drummers are exhausted, takes would often run into each other to actually make them tired. This even extended to Miles Teller ending up with real blisters and bleeding sores from overplaying, making some of the blood actually his.

** The grueling effort the would-be musicians put in to what they do over the course of the movie becomes all the more meaningful when one realizes that shooting this movie was completed in just 19 days due to the filming taking up 14 hours each day.
** Chazelle was badly injured in a car accident while making this movie but insisted on completing the shoot anyway, mirroring Andrew's commitment to playing after the accident he suffers.

** The original short has Fletcher threatening Andrew with the famously gross line, "I will ''fuck'' you like a pig!" For the feature, Chazelle actually rewrote the line to "I will gut you like a fucking pig!", but Simmons found it too ridiculous and refused to say it. For that reason, the feature uses audio of the original line ripped straight from the short, and since no new Fletcher footage was shot, a close-up of Andrew is used while the line is being said.

* CastTheExpert: Naturally, several of the musician roles went to actors with advanced musical backgrounds or actual musicians. For example, Carl[[note]](the initial core drummer in Fletcher's band)[[/note]] is played by Nate Lang, who is also a professional drummer who trained Creator/MilesTeller and Austin Stowell into their roles.