One minute everything's cool; the next this gray thing is on the street.

The gray thing moved closer, coming across open ground to get close to me.

If you don't, that gray thing going to get you.

I suddenly hit the grey thing and it fell back against the tree.

"You mean, those gray things are old Avery's test projections?"

"The small gray thing with sort of perspiration on it?"

When you came out of the sky in long gray things?

The gray things would wait until the fighting was over on land.

The unicorn thought that she could still see the night boiling where the gray thing had been.