But he wanted to know what that completely unbelievable racket had been.

As a physicist, tell me if there's anything in them you find completely unbelievable.

The thought of being able to come back to America made me happy, but really it sounded completely unbelievable.

That still left two completely unbelievable strokes of chance.

What an amazing, completely unbelievable scene, just to imagine the apocalyptic firelight that would be coming down here at five o'clock.

For one thing it had the virtue of being completely unbelievable.

They are trained to recognize that what seems completely unbelievable on the surface is scientifically possible if you understand the basic theory of the event.

I figured it would be hot here, but this is completely unbelievable.

Second time round the block they're just unbearable - not to mention completely unbelievable.

They were all as he had remembered them, all completely unbelievable.