I'm trying to remember what I was doing to plow my toe into the mat yesterday-- maybe trying to recover guard or go inverted, and my partner had her hand on my ankle-- it was NOT her fault, but I'm trying to recreate it. In any case, it's really sore. I can walk, sort of, and ran sort of during lunch class at the gym. I'm heading to jits in a few minutes so we'll see how it goes.
In the meantime, some cool dubstep I found, of all places, on the Jiu Jitsu Forums. Give it a few seconds, you'll get scared at the beginning, but it will make you smile.