Friend in high school was driving a 240Z willingly at a very high rate of speed to a rumble. Car left the road. Seat broke and sent his passenger friend out the back and killed him. He survived. After he was released from hospital, they had his trial. He got 5 years voluntary manslaughter, not murder. It was his best friend. He has had to carry that all these years over and above his sentence.
I'm sure this could have been argued other ways, but that was his conviction. Ironically, the friend had just got "speed up but don't kill us" out of his mouth, then they hit that one curve. It was known as deadman's curve for a reason.