Nice TRT and HGH (and who knows what else) enhanced kick! Rogan 15 years ago, in his prime, was much smaller than he is now before he got on all of the PEDs (which he openly admits to being on).
The one thing he is doing incorrectly technique wise, is taking a small step with his front foot before throwing his back kick. This telegraphs the kick and makes it easy for an elite level striker to spot and counter/stop.
Joe Rogan was faster when he was in his prime to all those attributing his kicks to hgh.
TRT Joe destroys Ludwig 9 times out of 10.
Source or gtfo.
Edit. Might have misread that one, if you weren't claiming he was on hgh, ignore my post ^^