You can't be too careful.
Treddin' on Thin Ice - Wikipedia
Stay safe, always assume you are on “Thin Ice”
Walking on thin ice
Beware of thin ice. It's cold, but ice not yet safe in most places, Public Service News
Thin Ice (2011) - IMDb
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Walking on Thin Ice: The EU Must Define its Arctic Strategy or Risk Getting Left Out in the Cold
On Thin Ice