I was taught to:
1) drill or chop holes close to shore first to check thickness
2) Carry a long pole/piece of wood (6 feet plus) so that if you fell, you wouldn't go under the ice (the idea of being swept under ice and not getting back to the hole you fell into...)
3) If going to rescue someone, tie off/get a line around yourself, and spread your body weight out by crawling/using a saucer/pan/kid's plastic sled...and offer them a line, pole, or thrown sleeve of a garment, not your hand.

anyway, looks like it was pond--they just lost some dignity.

That looks about balls deep.

When I was cub scout age in Calgary a guy from the left hand side of the normal distribution decided to test the safety of the ice on the Glenmore Resevoir by driving his VW Beetle onto it. It was safe for skating but not for cars.

#holdmybeer