the Abyss(1989)
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the Abyss
Bud (Ed Harris) makes it to the sea floor, and successfully disarms the nuke. Realizing that he hasn’t enough oxygen left to get back, he lies down to die. The amazing denizens of the ocean bottom save him, bring his entire crew to the surface, and (hopefully) teach humanity a valuable lesson about playing with dangerous toys in other people’s back yards.