Minutes later, he snapped alert at the pop of displaced air.

Nick snapped alert, balancing on the balls of his feet with his hands ready.

Kernaghan claims that "if he took the shirt off your back and showed you the blood of children in the fabric, people would snap alert."

Abbado snapped alert when he felt the plastic flex under the weight of someone kneeling beside him.

Then he was snapped alert by a thrilling realization.

Walter snaps alert, finding no notebook and the lab empty.

Krazz snapped alert; it was his turn to speak.

Miles snapped alert at Roic's voice on the cabin intercom.

Not until she threw her arms around his neck did he snap alert.

She snapped alert; her skin flickered hot, then cold, and seemed to crawl as though she'd just awakened from a faint.