 Quint heads toward shore to draw the shark into shallower waters, but he pushes the damaged engine past the safety limits and the overtaxed engine fails.With the "Orca" slowly sinking, the trio attempt a riskier approach.Hooper puts on scuba gear and enters the water in a shark-proof cage, intending to lethally inject the shark with strychnine, using a hypodermic spear.