Not very many people have actually heard a large explosion.

We heard the explosion, thought they must have done their business and been off.

David is close enough to hear the explosion at the end.

But he could tell they'd heard the explosion as well.

Of course, they would not hear the explosion, but if everything had gone according to plan it should be all over by now.

They did not hear the explosion, only felt it through their feet.

By then, you could hear explosions at all hours of the day and night.

As the two share the moment, an explosion is heard and felt.

People who live miles from the plant heard the explosion.

Others talked about having heard several explosions during the night.