Used other than with a figurative or idiomatic meaning: seetalk, about.
(idiomatic,colloquial)Used to draw attention to the speaker's characterization of someone or something
Talk about a loose cannon! Did you hear his TV speech?
1912, Stratemeyer Syndicate, chapter 1, in Baseball Joe on the School Nine:
"I should say yes," agreed George. "And talk about speed!" he added. "Wow! One ball he threw soaked me in the ear. I can feel it yet!" and he rubbed the side of his head reflectively.