[Lex stands on his library sliding ladder searching for a book
n... n... n...
'M'! You want 'M' Mr. Luthor?
[Otis moves the sliding ladder Lex is standing on, leaving Lex hanging from a shelf
So, there you go, 'M'.
'M' as in moron Otis? No, no, no, it's 'N'! 'N' as in neanderthal, nincompoop, nitwit and 'L' as in ladder!