Driving to the craft store today, I think I encountered one. There's a small diner-type restaurant right at the turn I take to get on the highway, and getting in and out of there is pretty hard. You have to back out of your parking spot at an angle, turn your car to face outward, and then go either right or left. Frequently, you have to wait for someone to let you in if the roads are busy.
I stopped behind a car that was half-way out of the parking lot and half-way in the road (this wasn't the Special Snowflake, it's just a tight squeeze!), and I kept about a car length between us because when the light turned green and he came all the way out, his back bumper would have clipped my front one.
Here's where the Special Snowflake comes in. The light was still red, and another car was backing out of its parking space. The woman at the wheel looked at me, looked at the car-length space between us, then looked at the car in front of me. She angled herself to follow the car in front of me, and she was still 'okay' at this point. She might have just intended to wait until it was safe to go without cutting someone (namely me) off. I sort of edged forward a bit, hoping she'd get the hint. She frowned and lurched forward about a foot, then looked at me again. I had to stop, or I would have bumped either her or the guy in front of both of us. I shook my head in annoyance, and she had to have seen it. I had gotten there well before she even began to back out of her space (that red light is notoriously long), and while I do let people in a lot of the time, I had gotten there first and was stalled, waiting next in line.
So, yeah. I had no choice, and I figured, "Oh well...", but the thing that really ticked me off was, when the woman very decisively pulled in front of me she waved as if I had just let her go. Struck me as being a bit presumptuous.
Or maybe I'm the Special Snowflake here, but I don't think so. Maybe I was just in a bad mood. She got her own way, at any rate (whether she deserved to or not).