Um... unless it's a clean break and then it would be physically impossible to run on it. It's not actually such an achievement. I've run on a broken ankle, the adrenalin means you don't feel the pain.
I will just add that I was pissed at the time as well so I had that extra pain buffer. But it's very possible and not that brave.
You really don't feel it until you stop. The next morning I couldn't even put my foot on the floor without screaming.