Why not just climb up and press

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Why dont the guy nearly winning dennis just climb up on his shoulder and press down ? Or it's impossible since he would have to flop wrist since dennis's arm is in a locked neutral position ?

https://preview.redd.it/2b1wnpupc26e1.png?width=552&format=png&auto=webp&s=b5e9d07f0a4eb43162e87f7ec998f6621f0129e4