Near as I can make out, they live in some sort of bubble.

Our weight was much less here, for we were near the center of the bubble.

He led us to my father, who was at the control section of the bubble.

Taking a step forward, he stopped at the edge of my bubble.

A lot of bubbles came up where he went down, but the man did not rise again: Good.

When the second set of bubbles is formed it's done.

The final car was in the center of dropping bubbles.

The lower the energy of the bubble, the longer it can exist.

He was old enough to remember coffee that did not have a collection of bubbles on top.

As a result, he said, there are "a lot of local bubbles" around the country.