The younger man looked sullen as he hurried out the door.

It just made him look sullen, and didn't really help anyway.

She looked dark and sullen, low upon the water as if crouched to spring.

He was making a poor effort at a suitable expression, but his face looked hurt and sullen.

Why is it that all models have to look sullen?

He slumped onto the edge of his bed, looking sullen.

The Kid is sitting under the shade tree looking sullen.

The guards continued to stand at the entrance to the door, looking sullen.

Jo looked sullen again, but her eyes were bright with tears.

Flip still looked sullen, but curiosity was getting the better of him.