Leo was sitting at the discussion table, doing his morse code insult thing when he heard a tapping. Annabeth's tapping.
They had an entire conversation like that, going back and forth. Needless to say, Annabeth was the only person who knew he was really depressed, so when he flew at Gaea on Festus, it hit her the hardest.
Everyone was confused, but Annabeth offered no explanation, only 'he'll tell you when he's ready'
