Listen to how L.Ron Hubbard audits out a Body Thetan.

From "Assists" Lecture. 3rd October 1968. #10 of the confidential Class VIII series of lecture:

"I suppose the guy who has trouble running another Thetan at that proximity probably not very horse-powered or something of the sort. Well all I ever did was a body Thetan was just think "go to the .. uh .. uh .. think Incident One zoooom! Go through it, get your stop off you know", "Rmmm", he says "Rmmmm. Zooooom! Hrrm. Hey that's mine!" he'd say. "I'm leaving!" I'd say "Good bye!" [laughter]"