When I was 19 or 20 I bought my first bike, a Ross roadbike.
Road around my quiet Brooklyn neighborhood. Then I got into
motorcycles/sportbikes(Interceptors, FZR's), the bicycle went
in the basement and was eventually given away. I worked as
a motorcycle messenger for a while in New York city, maybe
that's why even on the bicycle I'm used to the traffic. I'm
constantly scanning traffic; beside me, behind, pedestrians,
other cyclists, animals, etc.
http://www.youtube.com/watch?v=hheUc-zlfiM