Pull (one) up short phrase
To force someone to stop doing something suddenly.
Dan pulled up short in his car when a dog was crossing the road.
What has pulled me up short is a next-door scream.
His idea often pulls his boss up short.
The verb "pull" should be conjugated according to its tense.
Stupid or crazy
He is definitely not the full shilling when wearing a thick coat in this sultry weather.