At the same moment, a balloon of air began to form in the water outside.

The balloon began to rotate like a wheel on the V-shaped support.

He roared out an order and the balloon began to rise rapidly at the end of its cable.

All around them the other balloons were beginning to rise, too, huge bright balls soaring in the sunlight.

Gradually, the balloon began to rise, but the trees were still looming dangerously close.

The balloon began to drift on the breeze, heading towards the house, and they followed it.

The balloon immediately began to collapse on top of them.

The balloons were beginning to dissolve, one at a time.

Lambert was climbing hard over the German wire before the first balloon began to move.

For about a minute, nothing happened; then the balloon began to deflate and drifted down towards them.