Wish there was a way to get notified of replies on HN.

Anyway if you happen to see this I was not wearing a helmet, on flat ground. Not proud to say but I was on sidewalk and the rear wheel slipped off the side into soft ground bringing the entire apparatus to a quick halt from prob 15mph. Woke up a few min later with my face on the sidewalk and my legs curled up beneath me. Luckily I was wearing a thick stocking cap which prevented me from more serious injury. Total damage was bruised brow ridge and lip/chin, missing chunk of leg flesh apparently from hitting the handlebars, broken hand, and broken ribs.