I watch him fishtail as he's clearly futzing with something in his passenger seat, not looking forward at all (as I'm staying back enough to make sure I don't into an accident with this guy). Then suddenly he cuts BACK across all the lanes of traffic to make a left hand turn from the right driving lane.
I called the Dominos he left (as the truck nicely had their lit up sign with number on top) and let them know what their driver was up too.