This looks really fast on camera, which means it was insanely fast in real life. More and more I realize how much I suck at riding; and this guy certainly doesn't need any amusement parks to keep him entertained, all he needs is a bike
It could've been his practice and their race. Another maybe, could be they would mess up his flow through some of the track, and he passes them again anyways. :)
That back section is a little sketchy man, especially with all that loose rock, probably not a good passing section. It sounded like that little dip shit at 4:18 is yelling at him to slow down?