This guy weighs 70kilos and has approx 15kg weight on him so that's 85kilos (glad i was awake in maths class!), i've seen Steve K do this at 85kilos or very close to..I can do a right arm one arm chin at approx 80kilos...still its very impressive (especially his form) but it is attainable. It does not apply to the table and risk's big injury as I remember Ali Khan saying he injured himself trying these...!