Check out these stainless steel machining images:
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Image by sillydog
It was ninth in a series
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Image by sillydog
Having been a dancer, i think Theresa just had a better idea what her body could do. As such, she did all sorts of climbing you woundn’t catch me doing, even now that my fear of heights has been somewhat lessened.
Let me just say, having done this maneuver — it’s not a simple thing to hold yourself steady using only your feet.