It’s possible I hit the brake the same time as the car did and just didn’t notice, we’re talking fractions of a second here. Like I said in a previous comment, since I had the autopilot on I was able to look at more of my surroundings rather that just focusing only on the car in front of me so I actually saw him driving erratically a few minutes before that so when he was next to me I was being extra defensive and I reacted really quickly to it.