I just think the car crash was a traumatic event that left a lasting impression on his life. The same way the guy punching him did. The womanizing and boozing it up was all part of growing up. After the car crash is when he was entering adulthood. Maybe it helped usher in his transition out of adolescence. I don't think he died there. He seemed to live a long and happy life, but it just started going too fast the older he got, which is how life happens anyways.
The fact that a 42 second short film can conjure up all these different emotions and thoughts is truly a testament to it's power. We could all be right. I don't think there's any wrong way to look at it.