I wasn't the only one who had the idea. See this Waterboarding Demonstration Video. It lacks the melodrama of Hollywood depictions of torture. Being a controlled demonstration, it does not capture the fear of a man unsure of his fate, being shouted at in a foreign language.
Doubtless this will cause those with a nuanced view of torture to scoff, saying "What's the big deal?" Moral corruption at work, pardon the mess.