It's interesting. I was just thinking I am unhappy is a car zips close to me but I am quite happy zipping along just as close between queued stationary cars. The difference must be the level of trust I have in the person in control.
The question came up in a x-posted thread a while back, and someone said it was like the difference between shaving and having a stranger wave a razor in your face.
-- Mark, UK "If you believe the doctors, nothing is wholesome; if you believe the theologians, nothing is innocent; if you believe the military, nothing is safe."