What I find most interesting about Pete's OP is that although he was doing a legal maneuver, it looks absolutely crazy to turn left across lanes of traffic in an intersection.
Is it really crazy? Provided its a left turn only signal, I would expect slower moving traffic to keep right, and once you've made the left turn, you should be back on the right still. That's what you are instructed to do with a bicycle. Otherwise you'd cross to the left, or be in traffic, make your left turn, and now you'd have to move to the right again.

I guess the issue in this case is it was two left turn lanes, and then two straight lines. In this case I'd line up in the middle of the 4 lanes. Maybe that's what you've all been saying and I just didn't get it.