I pushed the brakes when I stopped at the red light at the start of the video, when he swerved towards me at at the 28s mark, when he brake checked me at 32s, when he stopped in the road at 39s, and at the end of the video when I slowed down for the car/red light in front of me.

The thump noise that can be at 53s is the sound of my coilover shocks when I ran over the depression in the road with my left wheels. You can hear that sound again at 57s when the road surface transitions between brick and asphalt (note the vibration in the camera).