Unfortunately you do get trolls like this on Yahoo! Answers, I frequent the site to help those that are in genune need of help, but these kind of people annoy me. It may be that the guy has a problem and needs professional help, he seems to be a fantasist, and the internet is the ideal outlet for this.
If you look at the Boats and Boating and aircraft sections you will find many people who claim to be millionares or you may even find a person claiming to be a long haul commercial pilot who later turns out to be 12. Its a sad fact of sites like this.
What has annoyed me about this is that he has taken the worst thing that could ever happen to a driver and used it to fuel his fantasy, I cannot imagine how stressful a fatality would be for a driver and it irritates me that this guy could make such a mockery of that.