damn, did it swell up.
A year ago or so I was walking down the stairs to go to dinner, somehow while daydreaming I thought I was closer to the bottom of the stairs than I really was, turned out I missed three steps and landed on my ankle. Hurt bad, swelled up. Exactly one week later on the same flight of stairs I do the exact same thing, this time it's way more serious and I can feel things tearing in there, since then my ankle has never been the same.