The tattoo
Im going by memory. And thats not very good anymore. LOL
I belive the tatoo had some bible scripture and it was written backwards so he could see it when he looked in his rear view mirror.
As far as not wearing a helmet. I used to race Motocross. You wouldnt catch me on a bike without one. But these guys live, and die by a different code than us. Its about freedom, and its impossible to explain it to regular citizens.