Larry gets crushed by an engine. The pressure from the water finally cracks the ballroom windows, drowning the occupants, including Captain Bradford. With the water rising rapidly, the group escapes through an air duct and some ballast tanks, although Elena hits her head underwater and drowns as a result. With the ship slowly sinking, the survivors soon find themselves in a crew lounge where they find the bow section is flooded, until an explosion of the engine room lifts it out of the water. The group enters the bow thruster room and are horrified to find the thrusters still running. With their path blocked by the propellers, and knowing that the control room is submerged in water, Robert swims away to turn off the engine. He finds the "shut off" switch to be broken, but presses the reverse button instead, before drowning. With the propellers now spinning in the other direction, Dylan throws an acetylene tank into it, causing an explosion that destroys the propeller, and leaving an opening for them to escape through. The group jumps out the thruster and swims to a nearby inflatable raft, and as they are getting into the raft, the ship starts to sink. As they are paddling away, the waves push the raft farther away from the sinking liner. Poseidon flips back over, and across the water, the survivors look on as she sinks stern-first deep into the ocean. After the survivors fire a flare, two helicopters and several ships arrive to rescue them, having tracked the location of the Poseidon'''s GPS beacon. Cast Production Production on the film began in July 2005. Sets As with the 1972 The Poseidon Adventure film, which based many of its sets on rooms aboard the RMS Queen Mary, the film's set designers drew inspiration for some of the spaces aboard the fictional "Poseidon" from rooms aboard the Queen Mary 2, most notably in Poseidon's ballroom, which is partly modeled on the one of Queen Mary 2. On the soundstage at Warner Bros. Studios, Burbank in California, two sets for each main room were built, one right-side-up and the other upside down. The upside-down ballroom was built on top of a large water tank in the soundstage so it could be flooded and drained in a matter of hours. The interior and exterior shots of the ship rolling were constructed with computer-generated imagery. Visual effects The primary