Have you ever been suddenly horrified by something in a way that suddenly made you feel frozen with shock for a moment, and as if a chill had suddenly enveloped your body? In the next moment, you might start to feel the anger or bewilderment or terror that the situation calls for, but that initial shock can be a feeling of flash-frozen cold.
"When I realized that those neglected toddlers had been locked in the closet since early morning, my blood ran cold."
"I stared at the headlines in the paper, my blood suddenly running cold: my country had just invaded its old ally."
"My blood ran cold as I stared at the empty sky where the twin towers had been."
It can also mean the type of anger that, instead of being a rapid ignition of hot rage, is a slow smoldering of icy fire that can last for days or years.
"His blood ran cold with unabated anger over all that he had lost in the war."