Waterboarding. I did not know how it works exactly. Just knew that there was water involved and that it induces the sympoms of drowning. Here is a video of a self-experiment. Thanks to DaddyD for this link.
Ah, yes: Result of the experiment: Yes, it is torture.
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link:
http://www.youtube.com/watch?v=qUkj9pjx3H0
