Passed trafic on yellow line, then crossed
over to the far lane where I was driving and
forsed me off the road to the left. When I
returned to my lane I flashed my lights at
him to take care of other road users. At this
point he slammed on brakes and I had to take
avasive action not to drive into the back of
him. I indicated he get off the road which he
did and then he started to threaten my wife
and I. After exchanging some colorful words
he left. But as he left he though an object
hitting my car on the left hand side, no
damage.