So, do you know anybody who has an octave laugh? They start laughing at a lower pitch, and by the time they're done they're up a whole octave? I started noticing that this one person I know who laughs like this, actually has a laugh progression in musical thirds. For example, in order to get from one C note to another on a piano, you can break up those notes into thirds, C-E-G...and then up to the next C note. *Hitting the notes C-E-G at the same time make up a C-chord. This person laughs like that, starting at a note and then going up by thirds. It's frightening, actually. Could she be a musical savant? Or is musicality so naturally ingrained in the human psyche, that it can't help but come out?