My grandfather recently passed. As he was dying blood began pouring out of his mouth, his body did not move at all while this was happening. The blood fully filled the oxygen mask he had on which covered his mouth and nose. He was laying in a hospital bed at an incline. Once the nurses took the oxygen mask off, more blood begAn pouring out of his mouth. What could cause this and how did the blood come up without his body jerking or moving at all?