How to turn a plastic yoyo into metal

Yo-Yo Videos
1

Seriously? yes seriously.
www.youtube.com/watch?v=MNzsDuIeL9M

2

I don’t get it…

Is it just the fact that he killed it with a plastic?

3

In case you didn’t see it through, it’s a “metal” song, you can see me making metal sign too.