A few weeks ago I was on a bike path when some fellow comes charging up the wrong side of the path directly toward me. As our closing speed was in the neighborhood of 35 MPH I had a "moment" before I was sure I could get out of the way. As we passed within a couple of inches of one another (and to the right of each other) I yelled "What the hell are you doing?!?" and he then instructed me to perform a physically impossible sexual act on myself.
I thought about turning around to follow up, as I looked to outweigh him by 50 pounds or so, but then came to my senses.
Moral of my story and of the opening poster's? Some people are idiots. 'Nuff said.