Hey, the mouse roars!
The more important question of course was how. How could he possibly have the time, in the last several months, to learn it, how would he learn unless he wasn’t with someone in a rescuing-capacity? How would he go unrecognized if that was the case? Sure, she could invent a scenario where he created an alternate persona in which he practiced human customs so as to come across as normal, or that he spent his off time he hung out at bars or with questionable associates. But there was occam’s razor. So, the simple answer to the question of how Superman, given his short time on this earth, would have the time and ability to learn such a peculiar talent?
Better duck Superman, Mad Dog Lane is tracking you down!
Oh yeah, the bit with Perry was a hoot!