>>11842603
It comes out of power level thinking in manga and asian media, which is derived from chi and asian mysticism around martial arts.

In the mystical view, humans are not just matter but posses a special power called Chi. Some can harness this power more than others, giving them extra-ordinary powers.

You see in Dragon Ball how this is harnessed for chi blasts, which then were the direct inspiration for Street Fighter's projectiles. Ryu adn Ken even make the same poses as the Kamehameha .