Whiplash is a film written and directed by Damien Chazelle, with a score by Justin Hurwitz. It is about a boy named Andrew (Miles Teller) who plays the drums, and his intense teacher Fletcher (J. K. Simmons).
There is a fan theory that La La Land and Whiplash take place within the same universe. After Fletcher is fired from Schafer Conservatory, he buys a restaurant, the one where Seb works. He does not want to hear any jazz because it reminds him of his years at Schafer.