I did not know that. [Which is a lie. He does know. Just how he knew about Cassie long before Scott even brought her up. But he knows that sounds borderline stalkerish (which, hey, he did it all because he was feeling guilty over who went to jail thanks to him Ross), so he doesn't mention it.

Instead, he just goes to the fridge for two Gatorades, glancing over at Scott when he talks about his college days. Which prompts a smile out of Tony, especially at the mention of Optimus Prime.] Optimus Prime is a good idea any time of the year. Why Christmas time? I'm assuming the experiment didn't work out, since I didn't hear anything about a giant robot destroying a college?

[Offering him the Gatorade, he smiles. The look on Scott's face is something he can't quite look away from, but he forces himself to look down at his own drink so that it doesn't look like he's straight up staring.]

I was a weapons manufacturer, remember? I used to test all my own stuff. Plenty of explosions. [He chuckles.] No need to shave off your eyebrows. I mean, [He motions to his own] see? These still look pretty damn good.