1. The jugular vein is an artery, not a vein.
2. The light from the flash of the camera penetrates the eyeball, bounces of the retina (the back of the eyeball) and is reflected back out the front of the eye. Because the retina has a large group of arteries the light reflected back is red.
3. Chocolate syrup.
4. Bleeding Gums Murphy.
5. Cognac.