Absolute terror. A willingness to say/do anything to make it go away. If one was to be waterboarded...as a demonstration, and then told they would be waterboarded twice a day, everyday until they told everything they know...it wouldn't be long until they told everything they know.
And how long did the physical “lasting effects” last once it stopped?
2 minutes? 2 hours? 2 days?
Or should that not be a factor, as the troll on this thread asserts we should not inflict any pain at all and simply put the guy in a comfy chair, serve him tea, and ask him polite questions?