No, fuck that. Riding a horse and giving mixed signals like tensing both reins, then releasing a little bit AND clicking, confuses and scares the horse. They can really tell when they have a rookie on their back, and it terrifies them. They don't know whether to gallop, canter, or trot when you do shit like this. So they buck, and the rider gets tossed.

Also, what makes you say he has "some idea"? Tell me something he did right. Anything. He's just sitting there trying to look cool, but he's failing even that. He leans back when he gets off-balance, which again pulls BOTH reins, so the horse canters now. And he's not sitting correctly either, because he starts jumping as soon as the canter begins.

that’s his choice and risk

Sorry, what? Are you really that dim? Horses aren't mindless, invulnerable beings. They get scared and angry, and they get hurt. And they have owners who love them.

Riding a horse is amazing, and everyone should try it. But this is a prime example of when you shouldn't try to show off. You risk the health of both yourself and the horse.

You can call me snooty for caring about this stuff, but I'd call you ignorant for all the shit you managed to pack into one sentence.