The hatch popped slightly, indicating a small difference in pressure - nothing abnormal.

And as he said that, the hatch opposite us popped open.

A hatch popped open, and men poured out, lining up.

A hatch popped open and a head emerged for a second.

At last the indicator light on the wall panel turned green and the hatch popped open with a little sigh.

A relay closed and hatches popped open at the base of the nose.

A hatch popped up and a dark figure jumped down, bent over him.

The hatch finally popped open and hung below the struts.

As he watched, the driver's hatch popped open and a man scrambled out.

The hatch popped from its housing like a champagne cork.