The forearm bump is one of the four cane releases (forearm bump outside, forearm bump inside, center lock, and standing center lock) taught in the IMAF.
In this video, Master of Tapi Tapi Chuck Gauss initially demonstrates the inside and outside version of the forearm bump. He demonstrates some simple applications off the forearm bump. Those include the slap off, same side bait to center lock, same side bait to standing center lock, cross body to slap off and a cane takedown. The techniques performed off the forearm bump constitute only a small fraction of the possibilities off this technique.
Let’s consider why these techniques are taught. In the heat of fast and furious tapi tapi play, what if the opponent grabs your cane? In this case, you have some basic counters for that scenario. Not surprisingly, the cane release techniques taught in the IMAF are not the only way to counter a cane grab. Other ways to counter a cane grab would include using your opponent’s cane against him or using your check hand to counter someone grabbing your cane.
This goes to the heart of the art, being able to counter any technique that an adversary attempts. Before his untimely death, Professor Presas was fond of saying that “tapi tapi is the heart of the art.” The ability to counter anything was important to him and is central to the art of Modern Arnis.
It is important to keep in mind that any and every technique taught in Modern Arnis can be used as a primary technique or as a counter technique. The possibilities are endless. On the face of it, the forearm bump looks simple and basic but there is a lot more to it.