Alright.  I thought I would post this because it had never happened to me before.  The engine revved and I killed it.  At the bottom of the hill, I started it again after checking throttle movement, obvious air leaks, etc.  Same thing, engine revved to the moon and the kill switch wouldn't stop it.  Had to grab brakes and dump the clutch to kill it.

The main jet came off the needle jet allowing the needle jet to move up in the throttle bore.  I assume that was holding the slide up a bit causing the rev.  Can anyone say disassemble a carb at Lizard Hill?