A few bubbles will begin to form on the surface.

Cook the pancakes for one minute, or until bubbles begin to appear on the surface.

A small grey bubble was beginning to form up on the ceiling.

Add the yeast to 120ml/4 fl oz of the water and leave for 2-3 minutes, until bubbles begin to form on the surface.

The white bubble rose, and began to float away.

The bubble began to close around her, to enfold her.

Cook until bubbles begin to break through, two to three minutes.

Giant bubbles began breaking the surface, thick rainbows of air and oil.

Smaller bubbles began appearing at other places along the shore, and some in the ocean itself.

Small bubbles began forming and within moments the mixture was boiling rapidly.