Honestly, I'm surprised this hasn't happened to me yet. It's coming... no pun intended.
This happened during a cricket match in Australia last week. One of the player's girfrlends didn't realize the camera panned to her as she was telling a raunchy story. Her crazy, sexy gestures were also caught on the field's jumbo screen. Teeheehee...
screenshot - YouTube
(full story: The Australian)
At :25, she really starts to get into it.
Video Credit: YouTube