http://foofighters.com/operationFrom the perspective of someone who had a major leg injury a couple years ago, I think it'd be absolutely ridiculous for him to try performing within the next 2 to 3 months. It wasn't just a broken leg...he had to have surgery, plus a dislocated ankle. I'd bet physical therapy will be involved. I'm sure he'll have the best care, but still. Maybe he'll figure something out and get wheeled around in some awesome Tommy Lee-meets-Inspector Gadget killer wheelchair, and if he can make it work, more power to him. Surgery takes a lot out of you though, and what he needs for now is rest.