I fear that-' There was a dull explosion somewhere behind them.

Sure enough, during the next hour a series of dull explosions punctuated the still air.

Far off through the window he saw another dull explosion and he thought, they may get me.

With a dull explosion a vacuum tube or what looked like one burst apart.

There was a dull explosion, and chips of rock flew up.

Finally there was a dull explosion and a flash of octarine light.

There was a dull explosion, and a burst of radiation from the machine.

A moment later a dull explosion thudded from the barrier.

Mine's only now getting down to a dull explosion.

He blinked away the dazzle as the dull explosion roared to him.