Rather than making jeers or various remarks, Cas simply stood and waited. He didn't see the humor in the situation or the absurdity outside of a man being forced to wear something meant for a woman. If anything, he felt a certain level of sympathy. Thinking of having to squeeze into anything of Anna's was uncomfortable at best. Given how small her vessel was, he was often amazed that she managed to do anything.
Before speaking, he waited for the flashing police lights to pass them. Naturally they would search, but with humans, it was exceedingly fortunate if they managed to look behind or around anything. And thankfully, the owners of the house in question were still sound asleep. He doubted his false FBI qualifications would help them at all in that situation and lying had never been one of his strengths.
"You did very well back there," he said. "Clearly, you've rigged explosions before. Where?"
It was his attempt at polite conversation. While he'd gotten better at it, he still found that he upset people more often than not. It was not intentional, but to explain that to them was like trying to discuss Shakespeare with cats. And while cats seemed to like him, they rarely listened to a word he ever said.