There has to be something that is about being live\ We human have sensation of pain, while animals don"t". There"s the sensation and emotional awfulness of pain": in surgery, or using morphine and heroine, i still feel the pain, but i don"t mind it anymore. Seems contradictory, cause we normally think pain. But actually the sensation is there, but the awfulness can be stopped. What it means to experience the intensity: the louderness of scream. How much you are tyring to get away from sth. So this maybe a measure of sensation, But it"s just a sigh and evidience, not a measure: if you want to measure the quality of something, how to measure of the duration of the pain. The perception of time by animal is differnet from human. You know nothing moves on the projector when watching moves. What you see is just a sequence of separate images you brain construct the movment even there"s no movement.