Newsflash: you don’t need expensive shocks or a motor to do mind boggling things on a bike.
All you need, in fact, is a bike. A one speed.
It can be your girlfriend’s, your grandma’s or your friendly neighborhood hipster’s (you can take or leave the bike basket full of old vinyls and ironic t-shirts).
Just ride and innovate. This guy sure as hell does.
Maybe opt for a helmet, though.