It's funny because I had a similar experience with an F-150 too (or one of these huge Ford trucks). That was 3 days ago on a the highway. His front bumper was almost kissing my rear bumper... He was flashing the lights while the left lane was really busy (his car was obviously higher so he could see the traffic in front of me). This is really unusual here in Ottawa. I turned the left signal because I really couldn't go anywhere unless I seriously slow down and take the middle lane. Of course he couldn't take it and went to the right lane and passed me and merged to the left lane in front of me where I had to press the brakes really hard to avoid what could be an accident. What's wrong with some people!
It may have not been the Tesla - in case you haven't noticed, there are a lot of terrible drivers in Ottawa, regardless of what you are driving. There certainly are the obnoxiously aggressive ones, but a much larger and arguably more dangerous fraction are just plain oblivious. And despite the "keep right except to pass" law, everyone in this town seems to think you're supposed to drive slow on the left and pass on the right. Drive south in the two lane section of Prince of Wales and you'll find this is the case for 95% of the drivers.