In this area, the ceiling drops to less than six feet (1.8 m).

Within two feet, the ceiling dropped three-eighths of an inch.

You'll notice that, right in the middle, the ceiling drops to about six and one-half feet.

Two hours later the ceiling dropped to a point where I couldn't stand upright.

From the outside corner of the joint where the top plates meet on the ceiling drop a plumb line to the floor.

Toward the back of the cave, the ceiling dropped and the rock walls narrowed.

The ceiling dropped dramatically here, and they moved on with their backs bent.

The ceiling dropped once again, and now even Tommy walked bent over.

The ceiling dropped, the walls closed in, the darkness was nearly complete.

The ceiling would drop to 675,000 in 1995.