While filming a scene in an empty pool, director Catherine Hardwicke fell and was knocked unconscious for two minutes. Many of the cast and crew thought she had died. When she came to, the pro-skaters there said "Now you know how it feels. Welcome to the club."
Due to a busy shooting schedule and time constraints, the scene where Jay shaves his head had to be shot in director Catherine Hardwicke's own bathroom.
Emile Hirsch claims the hardest trick he performed for the film was bombing down Bicknell Hill in Venice because he had to do the trick fast, shirtless, and with the camera car alongside him.
After Jay meets with Stacy and Kathy on Bicknell Hill, Stacy already has his 1972 Squareback car, but as he comes home in the next scene, he is riding his bicycle from the beginning of the movie.
Stacy: [Jay is rolling the window in Stacey's car up and down, breaks off the handle]
Damn it, Jay! Do you know how much this is gonna cost me to fix? you're an idiot!
What are the differences between the Theatrical Version and the Unrated Version?
A
The Unrated Version of the movie offers additional plot scenes as well as scenes with words which seemed to be not suitable for a PG-13 rating. Altogether the Unrated Version runs approx. 200 seconds longer than the Theatrical Version. A detailed comparison between both versions with pictures can be found here.