[Pipoquinha Bass]

I've seen this before, kid is incredible.

[9 String (Yes 9 String) Bass Guitar]

Heh, some crazy stuff out there, to be sure, I'd have to try one out in person before I'd say too bad about them, though I can't see too much use for extending the range 9-12 strings.

That said I have a 6er that's pretty fun to play, and I'd love to try a 7 string one day.