IANAL - You colliding with him while he's in front of you in renders it his fault legally, and probably won't hurt you at all in the process. Other people will see it.

If you're an experienced cyclist, and it sounds like you are, then you should find it easy to squeeze your front brake hard, and then lightly tap the rear brake to start a skid. Do this toward your favored side (lefties to the left) with your good foot aimed out to catch his metal, and you'll neatly come to an upright stop, braced by your foot, slammed up against the car.

Spectacular when it works, easy to pull off if you're good at controlled skids, and shifts all the legal blame immediately to the driver of the car. There should be a very loud thump, commanding the attention of all passersby.

That's when you start yelling at him.

Remember, don't curse him if there's children around!

I know it doesn't sound like much, but I had to stop for a few mins because the adrenaline was flowing and I was shaking a bit. I've always been aware how big and solid those buggers are, but when he was alongside me and swerving into my path, it became brutally obvious just how easily he could run me down by swerving a little too much, or braking a little too late...

Aaaaanyway.... Hopefully there won't be any more drama until next week, at least!