http://dryice.name/blog Tue, 31 Aug 2010 12:01:11 +0000 http://backend.userland.com/rss092 en I used to use my leg to "pull" my foot up. This is why my knee always get hurt after a long walk. And I noticed how Simon Yi Qin walk today: he use his front foot to "push" the floor, this is why he walks so fast. And the ... http://dryice.name/blog/misc/learned-how-to-walk/