Nightwing was feeling pretty good, injury or no. He couldn't regenerate damaged cells like some people in this city; he had to heal the old fashioned way. Healing the old fashioned way from a through-and-through in the leg takes a while, and now, it had definitely been a while. It wasn't too soon to get back into shape, however.
It was probably just a little bit reckless to go urban climbing when you've got one bum leg, but it was driving him nuts being stuck on the ground so damn much. The weather was still a little brisk and it felt good on his face just under the mask as he slid down a long roof and took an easy leap over an alleyway, tumbling in a controlled fall on the next building, that brought him up into a continuing run. He was a little weak on his bad leg, but he knew from experience that would come with time. "Yes!" he congratulated himself. "Nightwing is back in business!"
Caught up in adrenaline and the thrill of being out and moving Dick wasn't watching his footing, and all it took was a slight depression where a drain pipe used to be and his bad leg gave. "Oh sh--!" He went sliding down a fire escape, and twisted desperately. He managed to catch himself on a window ledge with a lucky three fingers, but lost his grip, dropping three stories and slamming on the closed roof of a trash bin with a loud crash. Rolling, he hit the ground a moment later with painful impact.