It could be the smoke rings... or maybe trying to figure out whether the second cylinder from the flywheel end is over fueling.
That thing is epic love the fact its fuel injected by computer so he can play tunes with individual cylinders AWESOME!
FRANK ZAPPA COSMIK DEBRIS MOTHERS OF INVENTION JEAN LUC PONTY GEORGE DUKE TOM FOWLER BRUCE FOWLER RUTH UNDERWOOD IAN UNDERWOOD RALPH HUMPHREY - LIVE View: https://www.youtube.com/watch?v=Dp6LT2MdaPI&feature=player_detailpage
I see a label for the Purple Coolant Additive. Maybe brand it as Tinken's Special Purple Phosphorescent Kool Aid. Where being cool is where it's at.