>>515815503
What are those two horizontal white lines that appear behind his head after the impact? You can see them in contrast of the black shirt guy. Picrelated sucks, they're more clear in the video.

Also, the two guys who appear like they're signalling, notice the second guy steps FORWARD before signalling. This only makes sense to do if the line of sight to him was obscured, which it wouldn't have been from the left or front, since the camera can see him. This means he needed to establish line of sight to his right side before signalling.