If he spat it out there would be a lot of it, you have huge veins in your tongue alone, also you would be pumped full of adrenalin so your heart would be beating faster and harder, for him to of got downstairs with those injuries I am surprised there are no bloodied hand prints on the walls or bannister, let alone a fight for life would of seen him put his hands on the walls table and or floor your reaction is to put your hands out to steady yourself, it makes no sense, even breathing blood would of cone out in droplets he would of been coughing as well I'd imagine so where is all the blood from the bedroom to the kitchen? I'd say those injuries were caused in the kitchen hence the blood pooling from his head into the coal scuttle?? It makes no sense