In the notes to the Mosaic box ( I don't remember who wrote them) the author described his impression that Brooks seemed intimidated by the fast company Alfred Lion gave him, and that Morgan and Clark, in particular audibly showed him where the hammer hang - I thought, too, that it sounded like that. Please have a look at the commentary to that session if you want more - as I said I sold the box set. Maybe I have a photocopy of the liner notes, but no idea where they could be stored.