Every time I cross in front of a car I have both hands sitting on the handlebar brakes. On one occasion I actually had to kick the car, someone started moving forward while I was right in front, I kind of bounced off the bumper with a foot and managed to maintain my balance. Thankfully didn't mess up their car, and they got out of the car to make sure I was alright.

It's not hostility very often, it's just not paying enough attention to things that aren't cars.