A sad note [spoiler alert]
[Spoiler alert: don't read unless you've seen the movie]
In this movie, Echo (Eva Marie Saint's character) dies in a car accident. Her character was 31.
In real life, Brandon De Wilde (Clinton, the young man who was infatuated with Echo) died in a car accident. He was only 30.
Don't mess with me, man! I know karate, judo, ju-jitsu..... and several other Japanese words.