No, im pretty sure he means jamming the lower leg bone up into the knee, although I don't understand the how or why. I think I remember doing something like hanging a foot out for corners perhaps 60 years ago ( kind of a then trendy thing) but it's so far back the whole process is lost to me except I recall loose surfaces being involved.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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