Diving into a pool

"Just dive in, man."

"But it's freezing!" he protested. "The moment my toe touches the water, the cold will strike like a blizzard. Instantly, my body will start freezing, bit by bit. I'll try to breathe, but the shock will be so intense, I'll forget how. My muscles will stiffen, my thoughts will fog up, and I'll turn into a floating ice cube before I can even scream for help. The Grim Reaper is watching, ready, because he knows my end is nigh."