1) Ok, guys, I give up. I was just surprised, that there is no active discussion about such kind of a record and there is no such record in a Book, so I've started the discussion.
2) I thought that "clean" kick means I didn't grab uke, didn't deal any damage to myself and touched him only with my feet. If the community says "clean" only about "1-frame", let's start competition "Most damage in one frame".
Sorry for my english, if my speech was too bad)