Have you seen some Japanese pranks videos?

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I found some japanese pranks videos from youtube. It's so hilarious that my friends and I can't just stop laughing. It's about the pranks they have made on their public toilets. And i can't imagine if this has happened here in the Philippines. For sure, Filipinos won't like this idea. But hey! It's so much fun to see. Are japanese really fond of these pranks? Here's the direct link to it: http://youtube.com/watch?v=EgnFyCMiFAU. Enjoy watching! :)