Clark Kent, Martha Kent and others in “Unfinished Business”

Clark Kent

You guys, I can see through things! How do you control that?

Martha Kent

You gotta practice, Clark. Your eyes have muscles, just like your legs.

Jonathan Kent

Your mom is right, son. Look, all you have to do is you have to figure out a way to, uh, condition them so you don't get these random flashes.

Clark Kent

Oh, that sounds great. How am I gonna do that?