@Poncho Most of the spots were specifically picked out by Brett for the filming aspect along with suggestions from Powell-Peralta staff and Kevin Harris.
Kilian is willing to skate anything you put in front of him. He has that sort of Daewon Song/Richie Jackson/Ben Raybourn aspect about environments.
He'll skate a park, ramp, bench, log, etc. When he first came to the states and met Mike Vallely they went around Mike's neighborhood and just skated anything they found that would entertain them.
He just genuinely loves to skate at every opportunity he can get. And I do agree that some of his tricks can look pretty sketch, but they are pushing the envelope in areas not many people are.
Mullen is simply a God who studied Engineering and Mathematics to make himself a better skater...
Daewon for example pushed Mullen's Technical ability and still does to this day while being one of the sketchiest skaters ever to grace a board.