That's very interesting! Personally, I enjoy learning new applications all the time. My eyes are perpetually being opened to new applications of various moves from the kata. Quite often, we'll practice a self-defense move, and sensei will ask "What kata is this from?" Sometimes it's obvious to us; sometimes he has to explain it; but once he does, we get it. The light bulb goes on!
Last night, we practiced a self-defense move from a straight punch. We step to the outside and change angle so that we're facing across the front of the attacker and his fist is across the front of our chest. Grab the hand or guide into it with our outside hand, turn the wrist, and run the inside arm hard across the top of the opponent's extended arm, while rotating it straight down. The attacker goes face-first into the ground at your feet; it's a beauty. Follow up with a fumi-komi stomp to the back of the head. Where is the move from? It's that so-called 'useless' dumping form inside Wansu kata. Yes, it's modified slightly, since you're not lifting the guy up. But the arm movements are exactly the same. Extend one arm to lock his arm out after deflecting the blow and DUMP straight down on the top/back of his upper arm/shoulder and he drops at your feet face down. You end up in a Seuinchin stance over his face-down body. Bam. Wansu.
I love that stuff!
