Footbag is a sport with many techniques that could be considered 'unnatural'. To this, I disagree. (for the most part) Aside from stalls requiring flexibilty (dragons, doof, zipper, etc.), footbag moves can be practised to become very natural regarding form. The body is only meant to move in certain ways. To put any sort of strain on your body as a sacrifice of hitting a move is VERY BAD. There is always a pain-free, more efficient way to do it. Knees are designed to bend one way. If you are bending your knees in any other direction, how miniscule the difference in angle may be, you NEED to fix your form.
One thing that's very common with players at the tiltless level is the forward facing orientation of butterflies and clippers. The support foot should be turned inwards and hips rotated away from the bag during the stall. The clipper should be futher 'behind' you with your knees together and both facing in the same direction. Keep the head and shoulders over the bag. Stay upright. Bad posture also equals bad form. I call hunching over 'zombie style'. This should never be practised on purpose for more than 5 minutes.
Taking these measures may prevent you from developing a nagging injury
This is, to me, the most efficient way of performing a clipper:

I have not suffered any serious or reoccuring injuries in my 4+ years of playing. It's not by luck as most people think.
Post any questions or tips you have on good form here.
