A fraction of a millisecond later, it collapsed inwards, and accelerating exponentially, vanished.

When the smoke cleared Collier saw that the bulkhead had vanished, collapsed inwards to seal off the stairs.

If the energy density of gamma rays is suddenly reduced, then the outer layers of the star will collapse inwards.

They are used across cuttings, to avoid them collapsing inwards.

When Jill looked back she saw the compound walls collapsing inwards in a rush of greasy black smoke.

Then it was as if all the air had been sucked from the room, and the thick cedar walls collapsed inwards with a monumental Whoosh!

And the meanings that were Chesarynth collapsed inwards in a deathly vortex.

A large section of the building immediately collapsed inwards.

They watched the Scorpions pound the walls of the old mansion until the shell collapsed inwards, falling with a tired but almost triumphant roar.

Finally the door collapsed inwards with a mighty crash.