Changing lane without checking his blind spot, cutting traffic off. Then sitting in the wrong lane for a mile and a half (ignoring plenty of road signs) before suddenly jumping back into the other lane to avoid going in the wrong direction.
Piss poor awareness, planning, lane discipline & indication.
Was doing under 40 in a 60 on a main road. Went to overtake, with plenty of time before an oncoming car would become a hazard, as I go to pass, they speed up to keep me from passing, and the oncoming car was closing in, obviously I pulled out of it and stuck behind them until an opportunity came up later on the road. They also kept on brake checking. (No photos as was driving).
Pulled out on me and threw a jelly belly air freshener at me