I think this hole in the ice is a sign that someone had a bad day.
But someone else didn’t take the warning.
“What do you mean the ice isn’t safe?”
“My foot’s cold… and wet.”
(And just in case you’re worried, the pond is pretty shallow here, so when Bax did actually break through, he was able to climb out without any trouble. Although he was a little miffed that the ground cracked and he ended up wet. I also had him on his long lead so he couldn’t wander too far.)