It is self-love inflamed to the acute point; conceit, with a hair-trigger.
It merely exploded him into action like a finger on a hair-trigger.
I then got a new dog and chained him, and a duelling pistol, with a hair-trigger.
As he was not a thoroughbred, his nerves were not of the hair-trigger order.
Every nerve was at tension, each muscle set at hair-trigger.