BMX jump trick Photography by Dimitar Hristov - 54ka Abstract acrobatics action adrenaline aggro air athlete bicycle big bike biker biking bmx boy castle challenge competition cycle cyclist danger dirt dirt-jump dirtjump extreme fear finale flying free freestyle fun gloves hard Helmet high jump kid man mid-air outdoor people person rail Ramp Ride rider risk silhouette skatepark skills spin sport stunt style tabletop teenager trick wheel young youth