That is awesome, I love seeing vids like this. BS5 off kicker is legit by any standard.
Does he swim all the way back to the start after a fall or does someone meet him at the shore with his chair? There was a dude at KC watersports doing this last summer that just swam all the way back, while strapped in still. I cannot fathom the miles one would swim in getting this good.
I also wonder about the landings and how hard that would be on the back.
This guy rips for sure tho, put up some more vids.