As Squidward put it himself: "Ich bin ziemlich sicher, dass der nicht de Dirigent de Wiener Philharmoniker ist."
That means "why don't you put the rest of the comic on here, to see how they react?"
Well, OK, it means "I am rather sure that that is not de Dirigent de Wiener Philharmonic" according to Google Translator, but you get the gist.