Why it’s harder than it seems: You can see point B from point A, but inching your way 70 feet across a freezing lake on a metal cable is tougher than it looks. (Pro tip: Hanging upside down by hooking your ankles together will give you leverage and extra hold.) “This requires an enormous amount of shoulder strength and the ability to not panic when you’re in this position,” says Kombol.
Completion rate: Roughly 65%, says Kombol.
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