The 'Vince McMahon Surprised' meme, often associated with the 'X When Y Walks In' format, stems from various clips of WWE chairman Vince McMahon exhibiting exaggerated facial expressions during wrestling segments. The most famous iteration uses a series of reactions showing him becoming increasingly ecstatic, culminating in him falling out of his chair. In the 'X When Y Walks In' context, the meme relies on ironic wordplay where a professional or entity (X) is intimidated by their literal opposite (Y). For example, a 'Fireman' being terrified when a 'Waterman' enters the room. It has become a staple of internet humor for its versatility in depicting over-the-top shock or comical dread.