Ooh!! This would be great! Maybe it starts to become so well known that others make jokes about. Like everybody knows Clark tells that joke all the time (something like, "that's because I'm Superman, Lois") and it becomes a running gag.
LOIS: Clark, what were you thinking running into danger like that?!
CLARK: Well, I--
RALPH: Haven't you heard, Lane? Kent here's Superman.
/all laugh/