The thought of the damage such a bomb could do made my blood run cold.
make (one's) blood run cold
To cause one to feel frightened or unnerved. The screams coming from the old, dark house made my blood run cold.That gruesome scene in the new horror movie made our blood run cold.
make someone's blood run cold
Fig. to shock or horrify someone. The terrible story in the newspaper made my blood run cold.I could tell you things about prisons that would make your blood run cold.