Under his hands the Comet leaped forward at terrible speed.

It was hard for him to believe she had gone from living to dead with such terrible speed.

The other lashed out at Conan as he closed, with terrible speed and strength.

The trouble was, the madman learned at a terrible speed.

I wanted to go at a terrible speed, to drive on and on forever.

The noise of the pursuit grew louder with terrible speed.

They snarled and snapped at each other, but managed somehow to keep the terrible speed under control.

As if they were mounted on some engine that was rushing toward me at terrible speed.

But he could hear the beast bearing down upon them with terrible speed.

Consider the terrible speed flying would mean on this world.