"The ice wall can break away at any time and crush the ship like paper."

"And keep that camera on the ice wall at the side, then straight up, turn about."

It almost swept me down and under the ice wall before I was ready to go.

"We should have used this for the first ice wall," I said.

There's nothing you can do about that, but without a special system the ice walls would have melted in no time.

She might as well have tried to climb an ice wall.

As they turn their back, a pair of glowing red eyes was seen to watch them from behind the ice wall.

It led past the cliff to an opening in the ice wall.

I think the ice wall is lower there in the middle.

He could see a bit in here - ice walls either side.