Yes, punching people in the head does depend on physics... as does the defraction of light to create illusions, walking, chewing gum, and breathing. Your point?
Hint: Saying something depends on physics is pretty much a meaningless statement. Physics = the laws of motion and matter, EVERYTHING depends on physics.
stopping time = fast movement that stops brain...infinity space or whatever only works in conditioned areas...emily has ability as tool toul to with time keeping...spitfire said it himself, with makigami as proof, that kazu is probably going to become successor...which means he has potential, which he's notice...no one can know what the author will do...he may make kazu give up on air treks...
Yeah, Buccha was never a king, he just called himself the "Night King" of the school while he was with the Yaou.
Two things I wanted to point out.
First, Buccha called himself the Night King because he ruled the school at night. He dominated all the students that stayed after school for one reason or another. Thus while Ikki and the East Side Guns ruled during the day, they left the terriotory open at night. Buccha moved in and staked his claim over the terriroty. Thats all. Now defining his riding, he's a Power Rider. He's made out to be a Panzer Tank in O!G's illistrations, like Kazu is match up with a Jet Plane.
And scondly, Iron Clock is not some kind of King of his own road. He's taken the Flame Road and manipulated it to be able to use it in hos own use. O!G explained how he "disappered" in the Cube event using the Crow that lives in Ikki's hair. Simple illusions using HEAT and a controlled space. Kazu was able to see through his illusion, thus forcing Iron Clock to use his seocnd ability by manipulating the Flame Road again. He disrupts the reaction time of the body, thus making it seem like you can't move and he's stopped time. If oyu remember during the Behemoth battle, Spitfire flashedbacked to when Iron Clock left his team in order to find a way to crush him and become the next Flame King. Thus the Pledge Queen, can't remember her name, was surprised when he wasn't going to make Iron Clock his successor.
As for Kazu, the fact that he performed Spitfire's intro trick, the one he did when he showed himself to Ikki, after only seeing it ONCE when it came out of no where, shows his potential. That and being able to see through Iron Clock's trick, as well as move a FINGER after that proves his ability. Iron Clock himself said that the value of his one finger moving was his victory. Heck, not even the Horn King was able to do that much. If he is trained in overdrive by Spitfire and Iron Clock, there's no doubt Kazu can achieve the title of King.