Arm Bow Drill !

This one was just for fun - using my arm as the bow ! I don't take credit for first trying this, qute a few people have tried it and @wur_thaz_smoke had previously cracked it. It's not as easy as it looks here and takes a bit of experimentation to get it right and to get the co-ordination :) A longer spindle helps - this came just below my knee; and it was quite thin so less pressure needed; multiple wraps of the cord were also needed and I found it easier if the end of cord in my hand came off the top of the wraps rather than the bottom. 
I can't think of any situation where I would need to use this technique - as there is usually a bow of some sort available!