You can watch him run on the Live with Regis and Kelly webcast. They are featuring several Guinness World Record breaking candidates this week, like a dude blowing balloons and another guy holding his breath. That's quite ok, as they all require a good set of lungs.
As dedicated fans like me will recall, Karno fell short of setting a new 24-hour treadmill record in June last year. He was running live on a webcast at Times Square in New York, and later admitted it was a bad idea. I guess ultrarunners never learn, huh?
If you are in New York, you should be able to see him in the ABC Studio window at 7 Lincoln Square (on the corner of Columbus and 67th Street).