Is the CM juggling phones always in the JIIWF line?

[DisneyHead123]

Are you sure he's not just copying the audio track behind one of the doors in the queue line where there's a lady going "Imagination Institute... Please hold!" over and over again?

Not a physical person. There is actually an audio effect at one of the doors.

Yes, this definitely went beyond repeating that track. He was ordering tacos, hanging up when there was “no answer”, etc. Probably inspired by that portion of the queue though.