Actor Bob Einstein, best known as 'Super Dave Osborne,' dies

Bob Einstein, the veteran comedy performer known for "The Smothers Brothers Comedy Hour," "Curb Your Enthusiasm" and his spoof daredevil character Super Dave Osborne, has died. Einstein was 76.

Details of Einstein's death were not immediately available. Representatives for him and Brooks did not immediately respond to calls or emails.

"It was an amazing, unforgettable experience knowing and working with him. There was no one like him, as he told us again and again," David said Wednesday. "We're all in a state of shock."

Einstein played Super Dave, a stuntman far more ambitious than he was agile. The character appeared on comedy-variety specials and series, most recently "Super Dave's Spike Tacular" in 2009.