Thor

"I should warn you, little Veor," said the giant, "that we will be going far out into the icy waters. I row farther out into the cold and stay out longer than a tiny thing like you can survive. Icicles will form on your beard, and your hair, and you will turn blue with cold. Probably you will die."
"Doesn't worry me," said Thor. "I like the cold. It's bracing. What are we using for bait?"

[...]

Thor ripped off the beast's head, placed it in his sack, and carried it down to the sea.
Hymir was in the boat. He had already cast off and was rowing out of the bay.
Thor jumped into the cold water and swam out, hauling his sack behind him. He grabbed the back of the boat with numb fingers, then hauled himself onboard, dripping with seawater, ice crusting his red beard.
"Ah," said Thor. "that was fun. Nothing to wake you up on a cold morning like a good swim."
Hymir said nothing. Thor took the other set of oars, and they began to row together. Soon enough the land was gone and they were alone on the waters of the northern sea. The ocean was grey, the waves were choppy and high, and the wind and the seagulls screamed.
Hymir stopped rowing. "We will fish here," he said.
"Here?" asked Thor. "We've hardly gone out into the sea at all." And he picked up the oars and began singlrhandedly to row them into deeper waters.
The boat flew across the waves.
"Stop!" boomed Hymir. "These waters are dangerous. This is where Jormungunder, the Midgard serpentm is to be found."
Thor stopped rowing.