I once saw a Asian kid run through a whole gym. He was about 17 and pulled up in a Jeep with no doors and asked the grand master if he could spar some black belts. Dude was like “no”, until he explained he was a 3rd degree black belt in Tang Soo Do.
After that it turned into a scene out of a Bruce lee movie.
No joke I saw the same thing happen in the hood once too. Dude was bringing his son home from Karate and some kids around the way started making fun of him cause he was dressed in the full outfit. He dropped that bag and went to work on 4 kids.