Not sure if this guy has been discussed here before, but he's very impressive.
Around 0:10 of this video he does a full one armed front pull with his elbow locked. I can't even imagine the strength required for this. In one of the videos in their channel he actually does a bunch in a row, but I couldn't find the video.
I've seen a video posted before of a guy who held a one armed front lever, but his elbow was bent... this seems much more impressive.
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