She reacted instantly to that voice and came to a dead halt.

Because all the protection is in place, if the leader reacts instantly, the fall might be only a few feet.

If someone had hailed her, she would have reacted instantly.

But even if I reacted instantly, he would fall twice the distance he'd gone from the last protection.

The badge reacts instantly to outside light and will turn dark in a few minutes.

The shooters saw him coming, and all three reacted instantly.

The new mode gave players the opportunity to react instantly in the game's battles.

He reacted instantly and shot the man with his Luger.

She had reacted instantly and without the slightest thought of consequence to herself.

I told her who I was and she reacted instantly.