You can keep a balloon inflated at great pressure by squeezing the neck.

The balloons inflated fast, each swelling out more than two meters in diameter.

There came a hiss of compressed gas, and the balloon inflated.

As the dry ice sublimes, the balloon inflates, and the mass stays the same.

Retrieved by a ship's boat, the package was brought on deck, the balloon inflated, and the pickup accomplished.

The propane burners are ignited periodically to keep the balloons inflated with hot air.

"It's like watching a balloon inflate," said another acquaintance.

As the balloon inflates, the subject accumulates rewards with each new key-press.

Doggins looked up at him; the fifth balloon was already inflating.

Selbert pressed a button and the balloon inflated with gas, to rise to the top of the high case.