“It’s true of people (and in principle, it should be for frogs, though I’ve never actually seen or heard of it happening to them).”
Sacre bleu!
What can I say, it happens frequently. I know it happens to animals in the wild too, in hot springs. They get in the water, then can’t get the strength to get out. I don’t go into hot tubs for that reason. There’s been a time or two I couldn’t have gotten out without help, so now I just don’t get in at all.