the shark pen. The largest shark grabs the stretcher and pulls the helicopter into the tower, killing Brenda and the pilots, as well as causing massive explosions that severely damage the facility. In the laboratory, Susan, Franklin, wrangler Carter Blake, marine biologist Janice Higgins, and engineer Tom Scoggins witness the shark smash the stretcher against the laboratory's main window, which then shatters, drowning Jim and flooding the facility. The group goes to the facility's wet entry, where they plan to take a submersible to escape. Susan confesses to the others that she and Jim genetically engineered the sharks to increase their brain size, as they were not large enough to harvest sufficient amounts of the protein complex; this had the side effect of making them smarter and more deadly. When the group reaches the wet entry, they discover that the submersible has been damaged. While delivering a monologue emphasizing the need for group unity, Franklin is dragged into the submersible pool by one of the sharks and devoured. The remaining crew opt to climb up the elevator shaft at the risk of destabilizing the pool. As they climb, explosive tremors cause the ladder to break, and Janice loses her grip and falls into the shark-infested water. Despite Carter's attempt to save her, one of the two remaining sharks drags Janice under, killing and devouring her. In the facility's kitchen, which has been partially flooded, cook Sherman "Preacher" Dudley, whose parrot is devoured in the process, manages to kill the first shark with an explosion. He then makes his way to the elevator shaft, where he encounters Carter, Scoggins, and Susan. Carter and Scoggins go to the flooded laboratory to activate a control panel that drains a stairway to the surface, while Susan heads to her room to collect her research material. Carter and Scoggins reach the control panel, but the largest shark storms in, killing and ripping Scoggins apart, and sabotaging the controls. In the other room, Susan encounters another shark, and electrocutes it with a power cable, destroying her research in the process. After regrouping, Carter, Susan, and Preacher go to a decompression chamber and swim to the surface. Preacher is grabbed by the last shark, but is released when he stabs the shark in the eye with his crucifix, though he escapes with injuries to his leg. Carter realizes that the sharks made them flood the facility, so