This YouTube clip is from a Fourcross group based in the UK. What is Fourcross, you ask? It's basically the mountain bike of wheelchairs and is designed for people in wheelchairs to tackle the same terrain as other mountain bikers. The difference is that with the four wheels of a Fourcross chair, it is more stable in some situations than its two-wheeled counterparts. Check out this clip of this group, known as the Rough Riderz, conquer some crazy backwood areas.