I invite anyone on this forum to grab a partner and try it. Unless you use aiki it will not work unless your partner is untrained or compliant. Using aiki I had no problem with the technique.
I don't know what aiki is but after I goggled it (I think all non-English terms should include English translation), it sounds like "bending with an attacker's movements" (I prefer to call it ability to change and borrow force). If A and B are on the same skill level, 99% of the time the 1st move (whether it's a punch, a kick, a lock, a throw) won't work. But if you use the 1st move to set up the 2nd move, the successful rate will get higher.
This is why I believe there should be 3 different levels of training.
1st level - you apply technique X, your opponent is down.
2nd level - your opponent applies technique X, you counter with technique Y.
3rd level - you apply technique X, your opponent counters with technique Y, you apply technique Z to counter his technique Y.
If you train this way, your training will be closer to reality.
Here is an example of the 1st level training:
- A's left hand grabs on B's right wrist and take B down with an elbow lock.
Here is an example of the 2nd level training:
- A's left hand grabs on B's right wrist.
- B rotates his right hand to put pressure on A's thumb, break away A's grip, and apply wrist lock on A.
Here is an example of the 3rd level training:
- A's left hand grabs on B's right wrist.
- B rotates his right hand to put pressure on A's thumb, and break away the grip.
- A takes advantage on B's wrist rotation, let go his left grip, move in and grab his left hand on B's elbow joint.