This guy is INSANE. Speeding backwards down steps, flips into the water, spins that would make a mere mortal dizzy - Tim Knoll manipulates his bike to perform tricks like you've never seen.
Milwaukee-based freestyle BMX rider, Knoll performs impressive stunts that combine bike riding with parkour street tricks using his bike, stairs, poles and platforms. His performances are astonishing, clever and athletic.
The bicycle has been around more than 100 years but Knoll has turned heads and changed opinions on what can be done on a bicycle.
His newest video is his most popular with millions of views: