Matthew Perry, beloved as Chandler Bing on the iconic sitcom Friends, once stepped in to prevent a storyline that could have drastically altered the show's course.  Actress Lisa Cash, who appeared as an extra, revealed that Chandler was originally scripted to cheat on Monica during their Vegas trip, but Perry intervened, believing "fans would never forgive him."  Let's watch the video to discover how this shocking change of plans unfolded and what ultimately replaced the controversial scene!