There's a lot to be worried about when out on the ice. Top of mind would be the threat of falling through. There's no more disconcerting a noise than that of a moaning fracture from beneath. Usually it's just the lake suffering some indigestion, but on Michigan's Sturgeon Bay, back in January of 1929, a fisherman trying to snag some food almost became it when the black maw to the growling belly below split open in an attempt to swallow him. Lewis Sweet escaped that fate, only to find himself being served on a platter.

Sources:

https://www.outdoorlife.com/survival/frozen-terror-outdoor-life-survival-story/

https://www.preservewhiteshoal.org/lewis-sweet-story

The Perilous Adventure of Lewis Sweet by O.J. Laylander

https://babel.hathitrust.org/cgi/pt?id=mdp.39015071139433&seq=28

https://mff.forest.mtu.edu/PDF/1-TreeBasics/3-History.pdf