Exclusive Youtube Nerf shorts from MacDannyGun! If you like this video click like and share it with others so we make more of them! Its the World’s Fastest Nerf Gun? #shortvideo #short subscribe or I ...

Guy Martin sets out to build the fastest gravity-powered racer the world has ever seen - and the result is an 85.6mph monster with no engine at all. Every part of the machine is engineered for speed, ...