What better way to cool off on a sweltering summer day than to enjoy thrill of a waterslide? I'm not talking about a backyard slip-n-slide, or the neighborhood pool though. What I have in mind is way more exciting. All across the world - even here in the states - the most intense, and terrifying waterslides can be found. Here are the Top 5 most terrifying water slides in the world!! 5. Tantrum Alley, Dubai Start off this slide by climbing into the 4-person raft, go through the first tornado to get your speed up. Then there is a downhill drop, followed by another tornado. Add one more downhill drop, and tornado and the slide is over. 4. Città del Mare, Italy We know some of the best stuff comes from Italy, Olive Oil, Wine, etc. So naturally, they said no more sliding into a pool. At this resort, hewed from the rugged and gorgeous Sicilian coast, you can ride a series of waterslides into the very Mediterranean itself 3. Big Thunder, Florida...