Below me the wall of rock dropped sheerly into a purple abyss.

A whole wall, with a doorway and rows of coat hooks, recently dropped from the second floor to the first.

The ancient walls drop precipitously to the beach beneath you.

With that first opening, a wall to foreign imports dropped to a tariff of 40 percent.

Then the back wall would drop and you'd walk out onto the street, Second Avenue.

Around the two men the yellow walls dropped until they were as close and tight as those of any prison.

The near wall dropped into a plain below.

A wall drops away and there behind it stands the Pavilion.

Something clicked above; the man in black sprang forward; a solid wall of steel dropped behind him.

The wall had dropped away, leaving a curved gap with two shelves.