I was sitting down on my floor for about 2 hours, cross legged. When I decided to go to the kitchen to have a drink, I stood up, and the next thing I know, I heard a crack sound, and twisted my right ankle.
It got quite serious, to the extent where I couldn't walk without a limp.
But it's getting better now.
At least I don't feel that much pain, and I don't walk with a limp. At least not that much.