There are only one or 2 moves in goju kata that I "reverse" in bunkai and I'm not sure what to make of these. I wonder whether -
(a) the kata were deliberately designed that way "as a code" (something I think is a bit overstated nowadays); or
(b) the kata were deliberately designed that way for an application I haven't seen; or
(c) the kata were deliberately designed that way for training or symbolic purposes (eg. stepping forward on the last move in gekisai dai ichi), not for any particular bunkai; or
(d) the kata have been wrongly passed down in respect of a particular move.
Consider the following move from sanseru kata at about 7:38 in the following video of Higaonna Morio sensei: http://www.youtube.com/watch?v=fGBdkOYQGoE
In most kaiha it is performed as a leg catch with a step back - see the following video at about 0:48: http://www.youtube.com/watch?v=RoXQbRCZNmQ
The problem is that the kata is performed with a step forward
. I think it is practically impossible to catch a kick as it moves out - you stand a much better chance of letting the kick pass its maximum velocity and then catch it just before/just as he is about to retract it. To my mind this requires a step back, not forward.
Tou'on ryu (and some goju schools) make sense of the leg catch by going right down to the ground and scooping at the ankle. I think this has "hairs" on it, but it does make some sense of the move.
My best guess is however that the move was probably meant to involve a step back. What say you? Similar moves in CMA have a step back in the form. Consider this move at 0:26 which is a block but can be converted into a leg catch:http://www.youtube.com/watch?v=oDaHVXzmccE