Perhaps dragging him further away would have reduced the risk, but I believe that we're instructed to leave accident victims alone unless there is an imminent danger. That's because moving them could aggravate an injury, causing paralysis or other. Also, you can see that there is a police officer on the scene, and he may have instructed the others to move away.
I hope that I'd act like the majority of them and not like the dude in the suit. For all I know, though, he wanted to help but knew that he physically couldn't do it.