I too was almost run-off the road, twice in the same day.
first a van pulls out of a swapmeet and then decides that he can merge into my lane, but my responsive skills are good and i dodged him. he stayed behind me and al i did was rev my car only moving forward by the inertia of speeding up. i was ready to out of my car and bash some windows.
second, i was driving at night on the first lane of a highway (more like a four-lane street) then all of a sudden, a white Elantra cuts my off. The fucker didnt even see me until i honked crazily at him. then a drove by his side and he apologized. that was a crazy day.