He seemed to have turned into some sort of space alien.

It had the overall effect of making them look like green and black space aliens.

"The next thing you'll hear is that space aliens did it."

He looked like a bug, even, or a space alien.

"And what're you going to do about this space alien of yours?"

We don't want anyone to know about these space aliens.

It has landed in this neighborhood like a space alien!

Could it be that a genuine space alien was only a few yards away?

Maybe the space aliens come from the right side of the brain.

It was a comedy about space aliens trying to run a car wash.