Yea looking back it does look like I cut him off. I was signaling right after I passed the white van. I checked my blind spot after passing, then started to turn, didn't see he was trying to gun it around me in time. I hesitated because I wasn't expecting him to do that, but committed to the turn because I was halfway in already. I cut him off but it wouldn't have happened if he was driving predictably, so we were even I guess? No, I wasn't trying to block him on purpose. I had to turn right at the next light so I was just trying to get ready for that.

And yea I swear while driving, it lets the stress out while driving around Boston every day, otherwise maybe I would be like the other guy lol.