Frank Nobilo weird grunts during Masters broadcast

It was by far the funniest part of the Masters broadcast this year, during the 3:13 minute mark of the CBS coverage, during the 11th hole fly-over, Frank Nobilo’s commentary is broken up by some really weird grunts.  Its almost like he was squeezing out some gas.  Sir Nick Faldo turns the commentary over to Nobilo who starts describing the 11th hole while a flyover shows on the screen, but then twice during his description interrupts with some soft grunts.  Very likely he was tooting on air during the Masters.  Other possible explanations include getting pleasured under the table during the commentary.