The voice of L Ron Hubbard From "Assists" lecture. 3 October 1968. #10 in the confidential Class VIII series of lectures:

Now you know how we were transported to Earth (Teegeeack) in such large numbers and why John Travolta's late son Jet's bedroom was modeled on the inside of a DC-8 aeroplane.

"They were imported. They were actually .. the trick was to shoot somebody, disable somebody, very often a needle into a lung and at the same time to hit him with frozen alcohol and glycol which preparation is guaranteed to pick up a Thetan. All they had to do was pick him up and put him in a refrigerator and they had him, boy. If he tried to exteriorize from the body, there he was, frozen.
And they threw 'em into collection points, boxed 'em up in boxes, threw 'em into space planes which were the exact copies of DC8's, the DC8 airplane is the exact copy of the space plane of that day. And, no difference, except the DC8 had fans, propellers on it and the space plane didn't."