He went quickly, his right hand keeping contact with the tunnel wall.

I took a step to the right and sank to the ground, my back against the tunnel wall.

He drew the crawling man to him, then moved back so that they were both against the tunnel wall.

The two of them tumbled over into the tunnel wall.

It was good to sit down with his back against the tunnel wall.

He concentrated every sense on the blur of light along the tunnel wall before him.

He hit his head against the tunnel wall and died.

In the ease of walking along the tunnel wall, they had forgotten the problem.

But on either side the tunnel walls were flowing past at a speed he could not even guess.

She leaned back against the tunnel wall and closed her eyes.