A particularly enjoyable moment for me was when the driver of a BMW 3-series decided he had had enough of sitting in the traffic queue and would turn right. Suddenly. Without indicating. Just as I was about to pass on the outside.
After a fairly controlled slide, I ended up at about 45 degrees with my wheels under his sill, all without actually makinig contact.
He started to lower his window:
"DON'T WIND THAT FUCKING WINDOW DOWN!!!'
"Er, why not?"
<Flips up visor> "'Cos if you do, I'm going to pull you out through it, rip your fucking arms off and beat you to death with the soggy ends!"
He raised his window, I extricated the machine and continued on my merry way while speculating at length on his parentage and striking similarity to various genitalia.