10. Sheamus Defeats Daniel Bryan - WrestleMania 28
Not so much an upset due to the result of the match, Sheamus' curtain-jerking victory over the beloved World Heavyweight Champion shocked fans due to its brutal brevity. Despite entering the match as a heel, Daniel Bryan rode a wave of fanatical crowd support - a precursor to his incredible rise over the next couple of years. Immediately after the opening bell he paused, turned to receive a good-luck kiss from girlfriend AJ Lee, and fell victim to a single thrust of Sheamus' right boot. One, two, three. The gobsmacked, angry reaction of those in attendance is the perfect example of an upset backfiring in the WWE's face. Regarded by many as an attempt of Vince McMahon to stick it to Bryan's legions of "smart" fans, while simultaneously assuring the rise of his hand-picked champion, the farce actually acted as a bizarre catalyst to the internet darling's transition to a mainstream favourite. A raucous reaction the following night on Raw proved his popularity, giving the company no option but to get behind the American Dragon's inevitable ascendency. https://www.youtube.com/watch?v=zF_kEtYlfBc