This review contains huge spoilers. Saw this movie in hope of a thrilling claustrophobic experience. But this was a disappointment. First of all the plot feels thin. Why is there a oil pipeline on the ocean floor outside Somalia? Why would a ship ever have thrown anchor in these pirate infested waters?Then the real crimes against the laws of nature begins. One of the divers has brought a bottle of shampoo in to the diving bell. A bell where there are no visible reasons to bring any hygiene products at all. When starting to descend another diver warns him about the risk of having it explode! because the increased pressure in the bell. That would of course only make the bottle less likely to leak. But the moment after the diver opens the lid and gets sprayed with shampoo. When finally ascending they argue about the risk of the bell not being capable of handling the shift in pressure. Most likely, the bell will be okay with a decreased pressure. Like this the movie goes on with total ignorance of what is realistic in a deep sea adventure. Just a waste of time in my opinion.