And while your under anesthesia think of some new skins to do.
A great idea, need to dream about something, might as well be some skins!
too bad that you don't get to dream about anything during that time, though 
Well, if you have both knees operated on, that means you'll have to rest a lot....that means you'll have more time to skin!
I hope everything goes well for you and they get you back on your feet soon! (literally)