How to use "instant" in a sentence

At the same time, the candid citizen must confess that if the policy of the government, upon vital questions affecting the whole people, is to be irrevocably fixed by decisions of the Supreme Court, the instant they are made, in ordinary litigation between parties in personal actions, the people will have ceased to be their own rulers, having to that extent practically resigned their government into the hands of that eminent tribunal

The box shuts in an instant, and then the gun is in his hand.

The insufferable bastard! She was furious, but she said nothing; she didn't trust herself to speak, afraid that she would start screaming at him the instant she opened her mouth.

Elliot Stryker halted on the threshold, surprised by her scream, and for an instant, she was relieved to see him.

In that instant Tina realized she had nothing to fear from the presence that lay behind this eerie manifestation

He decided he would kill her himself when the time came, and that thought gave him an instant erection.