... come from?

I, you know what? I don't know.

Like, so a long time ago, vertical jump wasn't a thing.

Like, there wasn't a lot of vertical jump programs out there and things like that.

And as I was getting into that, I was very fascinated by it.

So this was, this is pre-volleyball.

Like, I was so fascinated, and I, um, I, I did a lot of research on, like, the science behind vertical jump and things like that.

Yeah