The guy who took a beer bottle to the face from the lead singer of Big and Rich Friday morning says the whole thing started because -- surprise surprise -- Rich was stinking drunk. TMZ spoke with Jerry Montano, who says he was boozin' with John Rich at the Rainbow Bar and Grill in West Hollywood late Thursday night -- when suddenly John became an angry drunk, and started randomly yelling, "F**k L.A.! How do you guys live here?!" Montano says John was still bitter from a fight he was in at an L.A. bar the night before. Jerry says...