Yep. Many times. The poster of that vid is my KF brother, and our Sifu is standing on the far left of the screen. We perform on Maui annually, and Sifu Aquarius usually shows up to a gig or two of ours.
Our Sifu is pretty cool about it and will let him demo with us, always freaks out the new students.
He might be some trustafarian (Maui's loaded with those, lol), living like a dirty hippie just cause he finds it fun or whatever, 'cause he totes around a few grand in camera equipment sometimes. I got a pic of him somewhere in a deep scissors stance taking shots with a huge telephoto.

All joking aside he's a pretty big dude, with a firm handshake and a penetrating gaze...
Ya' never know...

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