As they contract, the bell closes in on itself and ejects water to propel itself forward.

BBC: Robotic jellyfish fuelled by hydrogen invented

She can't understand why Roger lets her into his life, then brutally ejects her, not just once but repeatedly.

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As it falls, it ejects two tungsten ballasts, a hundred and sixty-five pounds each, which tilt it backward to create lift.

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As the capsule thunders downwards, it ejects ballast blocks to move its centre of gravity and tilt its angle of attack.

BBC: Mars Curiosity rover success depends on 'crazy' landing

The booster ejects the satellite a few hundred kilometres above the Earth.

BBC: Science & Environment

It flies too fast to be hand-launched, so it ejects out of a thin tube with collapsible legs that a soldier can set up in an instant.

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