Playing the piano...

[Limbo]

Always wanted to play the piano?

[Magi]

That guy had the most annoying voice ever.

But props on his piano playing skills.

[Bram]

It's fake.

At the end of 'La cucaracha', he makes three chords that go 'low-high-low' by dropping two balls smultaneously. However, he drops them left-right-left for the viewer, which means right-left-right for himself, which means 'high-low-high' chords.

I've also ruled out the possibility that it's somehow a reverse keyboard, because the rest of the stuff makes sense. This clever trick requires skill indeed, but this skill is smore in timing than in piano juggling.

[forests failed you]

First the moon landing and now this.  Nothing good is real.

[Dozer]

It doesn't matter where the balls hit the piano, it will always produce the next programmed sound. That's all there is to it. The thing is, it's friggin' entertaining juggling! Who cares if he really hits the right keys? It's a show, people, not a concert.