The tunnel soon widened, and its floor became a series of shelf-formations.

The tunnel widened, and a few steps later, Seven found herself standing on a concrete floor.

He stuck his head through and saw that the tunnel actually widened after a few feet.

The tunnel widened a little as it curved to the right.

The tunnel had now widened into what looked like a big underground hall.

A few minutes later the tunnel widened, and he was unable to touch both walls at the same time.

When he made his way around the bend, the tunnel widened.

Suddenly, the tunnel widened and she was able to stand.

The tunnel widened a bit, allowing her more room to push and kick.

It was their first realization that the tunnel had widened around them.