Yeah I mean take a look at ChrisM's run ups, it's like he's attempting an in-game tip dunk or huge rebound/putback. It's explosive yet relaxed and confident..... I don't know if being more 'aggressive' is the way to go....
i dno, ChrisM always came off very aggressive to me .. even in his ball handling videos. From what I see, he really pushes the gas pedal in most athletic movements.
I mean to draw a contrast, someone I used to train, Eddie, was the complete opposite. Talk about relaxed, loose, effortless, that was him.
You can tell alot about someone by how they put plates on a barbell. Eddie never slammed a plate, dropped a weight, dropped a DB, etc.. He'd actually do a walking lunge or db stepup set with up to 70 lb db's, and he'd just crouch down and gently put them on the floor. His vert was absolutely insane, but his approach to everything was just incredibly laid back. Before his highest jumps, he would just sit there staring at the vertec or rim, you could see him internalizing everything. Sometimes i'd even try to amp him up and he'd literally do that "finger over the lips" gesture to be like, "be quiet, i'm focusing". Also in case you are wondering about eddie, here's a vid:
https://www.youtube.com/watch?v=T-zLl_IlNcY .... also, notice who is the one yelling. lmfao, I get really fucking amp'd and let it out.

So just drawing a picture of perhaps the polar opposite of the vibe I get from aggressive athletes like ChrisM.
As far as where scoob falls, I think he's somewhere in the middle, but definitely more so towards the aggressive side. I mean I saw him grunt recently and he hit a good jump afterwards, it looked like he got pissed and let more of the animal out. Personally, I do feel he needs to improve his mental game more, take note of all of the little details like we're talking about, figure out what makes him get those "goosebumps/chills" - surges of adrenaline, be more confident in his own athletic abilities - ie not question his plant speed or form etc & instead just focus all of that mental power into one thing, jumping with everything he has.
It's like during the lay up line warmups before the game, everyone is flying, because they are excited yet relaxed and in a trance/euphoria because it's GAME TIME. When you have experienced that feeling, well, your brain is wired to jump higher and your mechanics automatically get better....
That's why I advised him on playing with better competition or just getting better at BBALL will help him jump higher.....
Edit-- I think if one is a good basketball player, they will automatically have good mechanics on jumping....
i'm definitely not disagreeing with the layup line example you gave.. that's a great example, especially since in game situations & warmups for games etc, with the competitive environment, there's one thing that usually slips people's minds, overanalyzing things. One just gets consumed by the moment, of the inevitable competition, the extra adrenaline, and your body just takes over.
For me (with dunking), I was able to get that same game-time adrenaline by going to random courts and trying to jump/dunk in front of people. I took myself out of my comfort zone, risking "embarrassment", in search of that extra adrenaline. So I am in complete agreement there. Do I think he needs to actually play basketball to do that? nah .. not sure if he gets amp'd up like I did, going to random courts.
I also get a similar adrenaline/amp'd up feeling, surge of power, when I do these races, or if I go to a track and i'm surrounded by tons of people I don't know, who are training hard. For me, the crowd factor is huge.
Everyone should be conscious of that, of what environments bring out that extra power, speed, endurance etc. It's not easy to just turn it on when you're by yourself. In fact, trying to perform by yourself, could be disappointing, but then you put yourself in the right environment, get amp'd the fu*k up, and all of those mediocre sessions (done at hard effort) pay off.