Coppola nearly lost his mind making it, which is sort of the most on-brand thing possible.
Fun fact: Martin Sheen suffered a real heart attack on set and crawled half a mile for help.
Tarantino's version of a buddy road trip, just with more dynamite and considerably less chill.
Fun fact: DiCaprio accidentally crushed a real glass mid-scene, kept acting while bleeding, and the take made the final cut.