hair trigger

University students have a hair trigger when it comes to riots.

A million soldiers face each other on a hair trigger along a 1,800-mile border.

Couldn't he see the man was on a hair trigger?

This is the kind of approach that can put a pilot on hair trigger.

Star wasn't the only one whom fatigue had left with a hair trigger.

The situation with Harold was just too much on a hair trigger.

She learned he had a hair trigger for that first come of the day and shot off real quick.

George was twelve years old and had a hair trigger anyway.

Like most boys his age he had a hair trigger when it came to that first come of the day.

The region was on a hair trigger, the official said.