I don't know about Superman, but my mind goes to The Flash, with how everything is super fast for him, including his metabolism, so he just burns through calories as well as heals super fast (I guess the vibrational frequency at which bones heal are better for him or soemthing?)
I was going to make a joke about Shadow and Rogue on the other side of the hospital... Then I remembered Rule 34 and the likely hood that someones all ready done that hentai/fan fiction.
Listen! Hey, Sonic knew what he was doing. All he needed to do was to get 1 ring and he would be totally fine. It was a calculated risk! Who knew someone dropped a half eaten chilli dog on the track. But don't worry! As soon as Sonic can poke some eye holes he'll try again!