O.K. Peep this, last night i'm on the lightrail and 7 lets say "younger" people (early 20's) 3 chicks 4 dudes,get on . They were all in a great mood and we started talking. They said they were on a "downtown ride",when I asked what a downtown ride was one of the guy's said "take the train to downtown Campbell get drunk and ride to downtown San Jose" AAAAHHHHH ya know that's illegel,right operating a moving vehicle under the influence of alcohol and or drugs. They said they knew it's against the law. I told them that's a great way to get arrested or heck maybe even killed. I started checking out their bikes,no lights, no reflecters,and 1 helmet. When I started trying to talk some sense into these people they gave me a bit of an attitude, I tried, screw em' I just hope they all made it home safe. I've had a few concusions in my time, and I never knew what a helmet was untll I got into my 20's. I tried to pound the helmet thing and got no response. Whatever I know nothing.