Does anyone have the rest of the footage of Joe Louis Vs JHL?

The fight starts normally with both of the men walking and then standing to gather information, then it does an abrupt cut and next thing we see is JHL stumbling back into the ropes with both of his hands in the air as if Louis was aiming him with a handgun, he proceeds to rightfully maul his prey and leave him on the ground with you guessed it, both of his arms in the air as if he was on a rollercoaster

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What the hell happened here? i've read somewhere that this was considered Louis best performance so i kinda wanna see the full thing instead of just an execution, does anyone have the full footage? or is it lost to time?