This sounds like a really cool biomechanics/balance demonstration! From your description, it seems like the soccer player is showing controlled instability — essentially demonstrating how a powerful kick works through momentum and weight transfer.

What he’s illustrating is:

The key physics of a soccer kick:

• Each time he puts a foot down slowly/deliberately, his center of gravity stays balanced → no fall

• But when he commits to the kick, he intentionally falls into it — that forward momentum transfers directly into the ball

• The “jab step” you mentioned is classic — it’s a quick plant that loads the hip and core like a spring

It’s the same principle as throwing a punch or a baseball pitch — you’re not just swinging a limb, you’re falling controlled into the strike. The plant foot is what converts that fall into rotational power rather than face-planting.

The height comparisons at the start were probably showing the arc of the kicking leg — how the leg needs to drop low before sweeping through, which is where the power comes from.

Is this a coaching drill video, or more of a physics/sports science explainer? Would love to know who the player is!