YP has said that he believes Fury was moving his hand around inside a loose glove. So he would push his hand all the way in before he was going to throw tight-gloved shots. And move his fist into the palm area when he wanted to "slap" with his knuckles.
Note that I don't personally believe that. I'm just stating what he said in the videos.
Note that I don't personally believe that. I'm just stating what he said in the videos.

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