Your body can change its color after death!
After your heart stops pumping and your blood ceases to stop flowing through your veins, the blood will thicken at the lower parts of your body due to gravity. If the blood does not move, your dead body will likely change its color.
A decapitated head can still be aware of its surroundings!
“According to a 2011 study done by Dutch Scientists who were studying decapitated mice, electrical activity exists in severed heads, for about four seconds. This explains stories told by veterans, who have claimed to see the looks of grief or sorrow come over the faces of friends who have been decapitated. There may be truth to some lore, folks, ” notes Bustle.com.