Hmmm...aside from a few vulgarities....
The most 'violent', if you want to call it that , was one summer day when I was riding home on my commute. I had stopped at 7-11 to get a slurpee. I was riding home, when a car proceeded to pull up beside me on my left and do a right turn right in front of me. I needed both hands on the bar to keep from crashing into him, so I proceeded to launch my slurpee onto his car. Man was he pissed.
Served him right.