Wow, that tells us a lot! We learn that Superman's costume is invincible and that we were fools for ever viewing it as a plothole, that Superman is secretly a brilliant scientist despite this fact never having been hinted at before, and we even learn that he's kind of a dick for not sharing this miracle cloth with the rest of the world.
Behind the door Superman finds Mosely talking to Lex Luthor himself via television screen (WHY DID HE COME ALL THIS WAY THEN). Mosely ask's Luthor for stock-market advice, which Luthor gladly gives, reminding Mosely that he gets 75% of his profits (!!) for this information. Coulda done this by phone you guys, seriously.
Superman bursts onto the scene, shouting that Luthor's "evil career is ending NOW!" This guy is smart enough to invent invincible cloth, but he can't tell a tv from a real person? Superman's bullheadedness leads him into a trap: as two antenna zap him with powerful electricity the Man of Steel feels no ill effect and is instead charged as though he had spent the past year rubbing his feet on a carpet, a static charge he uses to destroy the vile television with a single light touch.
Protecting Mosely from the exploding tv's shrapnel, Superman then must rush from the cavern (Mosely cradled gently in his arms) as it does what evil caverns do best and collapses. Once safely outside Superman asks Mosely just what the heck is up with that incense! Remember that? It's such a mystery! You will be absolutely floored to learn that Luthor uses the incense to enslave prominent men across the nation.
Okay you probably figured that out quite a while ago, but don't get too cocky thinking you're better than Superman, I doubt any of us have invented invincible thread.
Note the "moustache dissapearing" lines. Classic.