It's interesting.
I've heard the opposite problem, where a victim sues the rescuer, claiming the rescue process led to further injury or jeopardy.
Also, I don't know if there are any good Samaritan laws that come into play.
As for the plaintiff, he took it upon himself to rescue the victim. Admirable, but done at his own risk. Since the accident didn't affect him directly, and he made the conscious decision to get involved, he entered at his own risk.
I agree with the case not being heard.