Board Thread:Percy Jackson & the Olympians/@comment-24055022-20151111001901

I've kind of been re-reading The Lightning Thief, and there's one thing I've always wondered the answer to. At the beginning of chapter 11, Annabeth's talking to Percy and she says this: “You know, maybe I should tell you. . . Something funny back on the bus. . .”

What was she going to tell Percy before Grover interrupted what she was telling him? It's not a big deal, I just want to know the answer to it out of curiosity, because I can't figure it out myself. 