Video report by ITV News Reporter Damon Green
Forcing his way through the ice, runner Darcy Pell wades through the freezing water to a dog in distress.
He had plunged into the frozen lake to rescue the drowning dog in West Yorkshire at the weekend.
Once the dog and Darcy were on dry land - he continued his winter run.
"When I saw the dog actually stopping, not trying to get out anymore... that's when I thought he needs a bit of help this dog," he told ITV News.
"I had a little run off, it came back to me and shook its water on me just to say, I suppose, thank you and then it just carried on with its walk."
But he said he's not a hero - and warned others not to copy him because of the dangers of such icy cold water.