Quad Blading

Take two roller blades and mount them on the end of two slightly shortened crutches (leave the length adjustment mechanisms in tact - you will need them). You now have a pair of hand blades - put them on. On maximum extension you can run forward and jump onto them, lifting your legs away from the ground and coasting a few metres before giving a kick or two to maintain speed. As you gain skill, confidence and shoulder muscles you can progress to blading in a fully inverted position.

Shorten the crutches to minimum extension and put a pair of blades on your feet. You have now got quad blades - try them out. You can cruise comfortably on four blades, body leaning forward, the arms taking much of the weight. The arms also increase your speed as they skate in sync with the legs. Cornering is faster with more traction and stability is improved, but you can easily return to two blades for short sprints. Advanced quad bladers can go from normal standing position to fully inverted hand blading postion while moving forward. Some have been known to complete the move with a flip, returning the their feet through a full 360 degrees.

Acknowledgements: Inspired by [crash]'s idea for "Hand Stilts" (long baked).