Behind him there was the sound of a tunnel being rapidly filled in.

Unfortunately, three days of rain began to fill the tunnel with water.

A few seconds later, a roaring sound filled the tunnel.

At that time water was allowed to fill the unfinished tunnel.

"Fill the tunnel with air and open up," she ordered.

Now the wind filled the tunnel, blowing straight through at a steady 10 or 15 miles per hour.

If it fills the whole tunnel in just one spot, the wind can't blow at all.

Wererats had filled the main tunnel behind him, following his route.

For a half-minute or more, his silence filled the tunnel.

Up and down the passage the echo of pouring water filled the tunnel.