[Well, to be fair, Kokichi isn't so much talking about it as Shuichi forced him to talk about it. Which is to say, he asked about it and then wouldn't drop it.]

[Right now though, Shuichi looks utterly perplexed, and a little concerned.]

Um...no, I didn't hit my head. But...why would I know about that? I wasn't in the hangar... I was in my room. I never left my room after we came back from the exit. I had no idea you were planning to break into the hangar.

[He's a little surprised she didn't tell him. But...then again, she had thought he was a coward for giving Kokichi the shutter remote to the hangar. And if she was going with the intent of killing him...she probably didn't want him trying to stop her.]