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Step 1: The Double Fisherman's Knot
Also known as the grapevine or Double Englishman's knot, the double fisherman's knot is normally used to tie 2 pieces of rope together, usually in climbing to secure lines together, or as a backup knot that makes sure you don't fall off the rock wall. (Not a good thing!)
If you want some more info on this check out this Wikipedia article