"Sleep if you wish," his thought snapped at me.

Mere thought of that name snapped Cranston from his reverie.

A nagging thought snapped into the front of her mind.

But a sudden thought snapped her out of her reverie.

Kirk's thoughts snapped into focus and he realized what was nagging at his subconscious.

"Sorry," he said, and with that word his thoughts snapped back into focus.

Her thoughts snapped back to what he had said before.

A thought snapped through her mind: I've got to wake up!

A thought snapped into focus in her head and she remained absolutely still.