He has been telling Avi all about Chester, and Avi has (Randy thinks) used this as a segue into reminiscing about the old days back in Seattle. It is somewhat unusual for Avi to do this; he tends to be very disciplined about having any given conversation be either business or personal, but never both at once. "I’ll never forget," Randy says, "going up to the roof of Andrew’s building to talk to him about the software, thinking to myself ‘gosh, this is kind of fun,’ and watching him just slowly and gradually go berserk before my eyes. It could almost make you believe in demonic possession."