This was fine for another few yards, but then a small trapdoor opened above and things began falling on that side too.

In the ceiling was a small trapdoor that led into the attic.

She looked up at a small trapdoor in the ceiling, and decided it would be easier to defend.

I recalled the small trapdoor at the far end of this pantry I'd discovered while seeking a new hiding place.

She pulled and jerked at the rusted latch that held the small trapdoor down.

I thought I saw a small trapdoor open and shut.

A small trapdoor and flight of steps led down into the pit for the doctor to examine the bodies after the drop.

The light shaft was operated by a wooden rod that opened a small trapdoor on the surface.

In the floor of the elevator was a small trapdoor that opened easily, giving a view of the dark pit below.

His eye detected a small, dark trapdoor in the roof of a house across the street.