Why is Waterboarding so bad?

You submerge the victims head underwater. When the lungs struggle for air, panic sets in. The mind goes into survival mode and will do anything to escape. Anything like say what it is they think the interrogator wants to hear. I don't recommend it's use, because there's really no way to know if someone is telling the truth. On one hand they are saying something just in hopes that you will not kill them. On the other hand, they might not care if they die and are just trying to mislead you.