What really boils my **** is people being polite when it doesn't help anyone. It's irrational and perhaps a bit grumpy of me but I'll try to explain. (Mrs Cube doesn't quite see why it's irritating) I live at the top of a lot of hills. The roads up to the top are steep, and being residential are littered with parked cars. I tend to plan ahead when I'm driving, and if I see a car approaching the other side of a car parked on my side of the road I will slow, change gear and get into a position to let the approaching car pass. I've done all the necessary preparation, and am timing it to suit me. As the gap clears I will go into the routine of getting the car going again, possibly, but not always a hill start from a standstill, but the timing all depends on the approaching car doing their bit, ie going through the gap I'm leaving them. All's going really well until the (in)considerate b*stard stops the other side of the obstruction and flashes me through. I don't want them to f*cking let me through, they've just bolloxed my finely judged routine. HOW F*CKING DARE THEY???
I have a variation on this: at a narrow bridge near here, I stop to allow the oncoming through and some twat overtakes me followed by a Pythonesque waving of arms and a litany of swear words that mean nothing at all outside of Quebec.e.g "tabernack (tabernacle) collis (chalice) crisse (christ) sacremere (sacrement) and so on.
Sometimes I laugh, sometimes I cry.