I get it often, but the latest one -
I was cycling up a hill, quietish 2 lane road, and had just passed a truck offloading goods on the opposite side of the road (i.e. it was in the path of oncoming traffic). Along comes some jerk (coming downhill, speedily) and pulls wide, not only early, but WIDE to miss the truck, in the end coming closer to me than he did to it. I could see as soon as he started swinging lanes that this was gonna be one of those near-miss oncoming incidents, and my impulse was to dummy a veer myself - make a quick swing that looks like I'M about to move over from the side of the road more towards the centre, and thus be somewhat in the way of Speeding Jerk. Note - not to ACTUALLY veer into the way, but just flick the handlebars so it looks like my intention. I have this impulse often, because I seem to encounter a lot of these "gotta get there QUICK and **** this cyclist who might not like me passing within two feet of him" idiots, but I don't ever do it because of the unpredictability of the driver's reaction - they might, as they should, slow down and remain in their lane until they're past me, or they might just panic and crash right into me or who knows what. But, damnit, it's tempting to find out.

Bloody selfish drivers!

[/rant]