Supercross competitors ride flat out on a demanding circuits that feature huge jumps and tough obstacles.
The notion of practice makes perfect is true for riders who make flying through the air look like child's play.
Watch episode 1 and 2 from the PitCrew series. We will be publishing a new episode as they're made available. Tune in tomorrow for the next dose of this thrilling viewing.
WATCH: Behind the scenes with pit crews - Episode 1: Canadian Nascar racing action
DOCUMENTARY: Watch Behind the scenes with Pit Crews - Episode 2: The flawless execution of changing tyres, refuelling
Please note that these videos are almost an hour long each, in case you want to view during night-time WiFi usage.