Kina Mutai (Ground Fighting)
The Filipino art of biting developed out of necessity due to the country's historical paradigm (David overcoming Goliath). The term Kina Mutai loosely translates into "the art of pinching and biting". Many of the late Filipino escrimadores possessed an invaluable strength to their grip. This was a byproduct of continually practicing and wielding heavy sticks, swords, and knives throughout the day and night. Some grandmasters of the art are known to have publicly displayed their ability to husk coconuts with bare hands, one being Floro Villabrille.
Possessing this type of strength and combining it with biting is the Filipino way of "cheating" when it comes to ground defense. Keep in mind that anyone "can bite" but a Kina Mutai practitioner knows how to bite (using the incisors), when to bite, places on the body to bite and can perform this function without any interruption (meaning the other person cannot get away from you or your biting technique).
Combining the art of Kina Mutai with jiu-jitsu creates a hybrid ground art that is perhaps the most formidable on the planet. You can rely on this system in a self-defense situation against a bigger, much stronger attacker and either beat them at their own game or give yourself enough space to get to your feet (especially if your goal is to run).