No, it wasn't the biggest heel turn in wrestling history, but to me this will always rank as the best. Bret Hart had spent many years as the face of the (then) WWF, when he loses a grueling Iron Man championship match to HBK. The look on Bret's face when Gorilla Monsoon ordered him back to to the ring after the 60 minute mark, and him looking on in disbelief as HBK hoisted the Heavyweight title belt in the air marked a new and edgier path for the Hitman. Bret took some time off after that, and there was much speculation whether or not he would ever come back. Along comes The Texas Rattlesnake, Stone Cold Steve Austin. He is full of venom, and uses much of his promo time to berate Bret Hart. As he sits home watching this, Bret grows angrier and angrier at this disrespect that is launched at him week after week. Stone Cold issues a challenge for Bret to come out of retirement and face him like a man, which Bret accepts. Bret wasn't about to let this degenerate redneck tarnish his reputation. The intensity of this feud was off the charts. Their Wrestlemania match ranks among the greatest ever, and with good reason. These two threw everything they had at each other in their famous "I Quit" match. It was epic storytelling in the ring, as Bret emerged the heel, while Stone Cold emerged the face. This led to Bret turning on the disloyal fans and the company that he served so faithfully for years. It also led to Bret being cheered everywhere else in the world, except the USA. The US fans were die hard Austin fans by now, and Bret tapped in to that as fodder for their bloodthirsty culture and betrayal of decency. It eventually led to the reunion of the Hart Foundation. It will always stand out to me as one of my favorite moments in WWE history. It truly was the watershed moment that led to the Attitude Era in my opinion. Bret became much edgier, and even physically attacked Vince McMahon (who was not yet revealed as the owner of the corporation. It was certainly foreshadowing, though).