Forensics? LOL. Last sidewalk rider to buy the farm in my area got attacked by a red wing black bird while riding with his kids. It spooked him so bad, he fell off his bike and hit his head. Last road rider was riding on a narrow road against traffic where no sidewalk was available when he was struck head on. The town built a sidewalk where he got hit, so it wouldn't happen again. Sooo, sidewalks will either kill you or save your life??? Nah. You can hit your head doing anything and die, and riding against traffic is probably stupid. Both incidents got my attention, neither kept me off the bike. I am no less vulnerable than before, no more either. But the guy that got doored and then run over, well, I must confess that I do leave a bit more room when passing parked cars than I used to.