The Internet has done a really good job of bingeing "Friends" on Netflix. Our collective hive mind caught the "Reserved" sign at Central Perk and wrote a think piece about how Chandler is actually the worst. But no one caught the Monica BODY SNATCHER in "The One With Rachel's Date" (Season 8, Episode 5, approximately six minutes and 20 seconds in).
Watch the GIF above. We have Phoebe and Monica talking on the couch, before the shot cuts to a woman who is blatantly not Monica. Obviously, this points to a greater conspiracy that threatens the very fabric of human existence (or just crappy stand-in camera work). Only Bizarro Monica can say.