I did hill sprints tonight, and my legs felt like someone had stabbed knives through them. My greatest incentive in doing them is to make analogies like that, by the way.
After those, I managed to shadowbox without vomiting out any internal organs (which was disappointing). Next, I practiced holding the horse stance for several sets. There was pain.
On the more casual front, I've been playing EyeToy more, specifically Sega Superstars. It looks way cooler when you're not this kid: