Thor

And that was when the sea eruped. Jormungunder, the Midgard serpent, had bitten down on the huge ox head, and the hook had dug deep into the roof of its mouth. The serpent writhed in the water, trying to free itself.
Thor held on to the line.
"It's going to drag us under!" boomed Hymir in horror. "Let go of the line!"
Thor shook his head. He strained against the fishing line, determined to hold on.
The hunder god slammed his feet through the bottom of the boat, and he used the sea bottom to brace himself, and he began to haul Jormungundr up on board.
The serpent spat gouts of black poison towards them. Thor ducked, and the poison missed him. He continued to pull.
"It's the Midgard serpent, you fool!" shouted Hymir. "Let go of the line! We'll both die!"
Thor said nothing, just hauled the line, hand over hand, his eyes fixed on his enemy. "I will kill you," he whispered to the serpent, beneath the roar of the waves and the howl of the wind and the thrashing and screaming of the beast. "Or you will kwill me. This I swear."
He said it beneath his breath, but he could have sworn that the Midgard serpent heard him. It fixed him with its eyes, and the next gout of poison came so close to Thor that he could taste it on the ocean air. The poison sprayed his shoulder, and it burned where it touched.
Thor simply laughed and hauled again.
Shomewhere, it seemed to Thor, in the distance, Hymir was babbling and grumbling and shouting about the monstrous serpent, and about the sea rushing into the rowing boat, and about how they would both die out here, in the cold, cold ocean, so far from dry land. Thor did not care about any of this. He was fighting the serpent, playing it, letting it exhaust itself thrashing and pulling.
Thor began to pull the fishing line back on to the boat.
The Midgard serpent's head was almost within striking distance. Thor reached down without glancing away, and his wingers closed around the haft of his hammer. He knew just where the head of the hammer would need to strike to kill the serpent. One more heave on the fishing line and—
Hymir's bait knife flashed, and the line was cut. Jormungundr, the serpent, reared up, high above the boat, then tumbled back into the sea.