On Thursday, April 18, 2013 12:00:14 PM UTC-4, wrote:
So, I wonder: What would make the darn thing rev like crazy?

If it's less than one year old it's still under warranty and you can take it for service.

Odds are it's just the governor stuck. Need to pull off the shroud and look.

But you probably ruined it by running it like that for 30 minutes.