He smiled tensely.
Warren was smiling tensely.
A look must have come into Helen's face, because he smiled tensely and said, "Your expression says I'm getting too involved."
Harry smiled tensely as he left the telephone booth.
He looked away from her, looked back, smiled tensely, and said, "I started to tell you, earlier, but I rather lost my nerve.
He stood by her elbow, and smiled tensely.
He smiled tensely from his position on the floor.
Smiling tensely, he strains forward and strikes himself dumb.
Smiling tensely, he refused everything except water.