blood turns to ice
See: BLOOD RUNS COLD.
You are chilled or shivering from great fright or horror; you are terrified or horrified. - Usually used with a possessive.
The horror movie made the children's blood run cold.

Mary's blood froze when she had to walk through the cemetery at night.

Oscar's blood turned to ice when he saw the shadow pass by outside the window.
Compare: HAIR STAND ON END, THE CREEPS.

[TahlilGaran] English Idioms Dictionary ▲