Do not try to take off or we'll turn your ship into a gas cloud!

They're left over from the big gas cloud that formed the solar system.

The gas cloud hung over the station, and killed 3,000 people.

The gas cloud picked up speed and moved ahead of the main slide.

Humans were not the only ones that needed protection from gas clouds, however.

The gas cloud moved closer to him, and then higher, right up to his face.

A gas cloud, in the shape of a small dog.

The last fire was brought under control near dawn today after sending a huge gas cloud over the city of 170,000 people.

That's our last cover, actually, because otherwise by this time we'd be a gas cloud!

The leading three men had run straight into the gas cloud without knowing it.