I had a similar experience on an incline at the end of 30-mile ride. This is a popular intersection where motorists are know for "rolling through the stop sign", taking a very brief look, after being halfway into the turn and just rolling through. I saw the silver Dodge Magnum pull up and start his roll. I signaled my intent to go through the intersection (In addition to having the right of way, I was on an incline after all and was not willing to stop so "Nimrod" could roll through.) To my suprise this guy just kept slowly rolling straight accross the intersection, not turning at all. I could have tapped the brake and passed behind him, but something in me snapped and I passed along the side of the car, the whole time banging on the car, yelling "Stop". "Stop". I made my way around to the front of his auto and stopped there, barring his way. I pointed at the intesection he just rolled though and yelled.

"There's a Stop sign there! you are supposed to come to a full stop and yeild. I don't have a stop sign, I have the right of way", gesturing the direction I was going in. "You have to Yeild". The guy just put up his hands in surrender. I got back on my bike to ride off, but was so upset, I could not clip in.

I don't know where that came from, but it sure came in handy that day.