This is a story CONFERENCE, not the typical story MEETING. More participants are invited, from outside the story department.
It it appears that a request was previously sent out requesting ideas for story improvement (PLUS-ing) of the Cleaning Sequence.
My favorite visual “PLUS-ing” gag came from Phil: When the little squirrel sneezes in the dust — the violence of his sneeze sends him back into an old German stein – the lid falls and closes on him.
On a side note, later that year, attendee H.S. Teague died in a United Airlines plane crash (he was only 28 years old):
This story conference document can be read/downloaded here: