Continuity mistake: Perry White has the Mad Scientist’s letter straight on his desk, but then it turns it to a diagonal angle when he reads it to Lois and Clark. Lois says that she wants to crack the case on her own and the shot pans back to Perry as he thinks about it for a moment, and this shot shows the letter still diagonal on the desk. Then Lois shouts out "Thanks Chief" and dashes off before he can respond and the image cuts to a different angle. Now suddenly the letter is straight on his desk like it was before he turned it.
Picture added by Quantom X
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