Thinking rapidly, William fixed a blank look on his face.

Vicki stared at him for a few seconds, thinking rapidly.

Paul rubbed his hand hard over his mouth, thinking rapidly.

He is highly intelligent and can think rapidly when he has to.

Back now, myself, on ground level, I thought rapidly.

She thought rapidly, trying to lay a line of defenses.

He paused, thinking rapidly as his eyes scanned the top of the display.

She started to move away and I caught her by the arm, thinking rapidly.

Rapidly thinking in Long View terms, she picked a number.

"It happened on Titan about ten years ago," he said, thinking rapidly.