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the concept of 'grandad-ing' is quite complicated for some people to grasp. 'grandad-ing' is when you find an innocent unaware soul in the street. U then knee them in the thigh.. and this is 'grandad-ing'...you call it 'grandad-ing' because after you have comppleted the technique you walk like a cripple...this is the 'grandad' concept :D
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