What's with Angus' mouth?

[Junior_Spaceman]

@Fiddle_Peghead

There is a well-known classical pianist, Andre Watts, who I saw play at the Kennedy Center years ago. During extremely rapid playing, his lips would flap up in down, seemingly with every key he struck on the piano. It was a thing to behold.

Great Scot! http://www.youtube.com/watch?v=WVsiAtKeMEQ - It looks like he’s counting really really fast.