Thor went off looking for some bait until he saw a heard of oxen belonging to Hymir. Thor caught the biggest ox and ripped off its head, and took it with him down to the boat.
Hymir was already sitting in the boat when Thor got down to the shoreline. Thor jumped into the boat and sat down towards the stern and took two oars and began rowing.
After a little while the giant said; Ok boy, we are at my spot now. This is where I always fish.
Thor replied; let’s go further out, there are bigger fish out there.
15 minutes later the giant said; I think we should stop here, we are already very far out, and it is dangerous to go further out to sea.
Thor did not listen to the giant and kept rowing the boat further out to sea, which made the giant clearly worried and unhappy.
Finally, Thor pulled up his oars and began to prepare his line, he baited the hook with the ox head and threw it overboard, where it sank to the bottom.
A few hours went by, and suddenly something had taken the bait. It was the Midgard serpent, it had opened its mouth and swallowed the ox head. The hook had dugged itself into the gums of its mouth and the serpent moved back and forth in pain.