It's all fun and games until someone gets hurt... but, stuff like this can happen anytime, and we don't know if the other rider bears any responsibility. At least this guy is shaken by what happened and is standing up for his actions.
I got hit by a lawyer's kid on a borrowed jet ski. He had just jumped a large wake with no concern for what he couldn't see on the other side. When I saw him in the air I was able to roll so he ended up landing on the side of mine. Minor damage to mine but most of his went to the bottom. I got him back to shore, where his parents left all their gear behind and ran. The people that loaned the jet ski knew who they were, and all the damage was paid for, but I'm sure they needed time to come up with a big lie in case I'd been hurt.
That lawyer would have told the girlfriend to lose the camera.