The gentleman has 4th Dan marking on his obi (belt) … which is considered just below master rank. In some systems it is considered a “junior master”. Once past 1st or 2nd Dan, a practitioner is officially a bad ass …
Unless they are ranked in a system which awards black belts to 12 year olds. We call those schools “candy shops” or “McDojos”). This guy is not from one of those systems. Untrained people no matter their size generally would have little chance against someone of that rank.
i wonder why they aren’t in mma dominating then? They could make serious money-