Street Performer plays the Harry Potter theme music with wine glasses, they produce a beautiful and atmospheric sound.

Absolutely magical.
Anim3mez

If Guitar Hero was still around this would make a great expansion. Wine Glass Hero would have a crazy expensive controller though.
fonduktoe

He really needs to record this in a studio. I was mad with all those people making noises that distract from the magic.
paulsmt

The gist of it is: rubbing wet fingers on glass causes it to vibrate, vibrations cause sound, pitch depends on size of the glass and/or how much water is in it.
Jc885