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To make one's blood run cold

Idiom: To make one’s blood run cold

Example 1: 
Don’t see the movie “The Exorcist!” It’s so scaryIt made my blood run cold! 

Example 2:
There was a terrible car accident near my home. The sound of the crash made my blood run cold! It was so shocking and scary. 

something makesone’s blood run coldmeans that something really scared/shocked/terrified someone.