10 Biggest Post-WWE WrestleMania Shockers

10. Brock Goes Nuts (2015)

Some people expected Brock Lesnar to retain the WWE Championship at WrestleMania 31, while some people thought that Roman Reigns was going to end his title run. Fewer fans correctly predicted that Seth Rollins would cash in his Money in the Bank briefcase during the match, pin Reigns, and thereby steal the title from Lesnar.

Needless to say, the next evening on Raw, Brock Lesnar wasn't happy - but he was focused. "The Beast" was ready to cash in his rematch clause and win the title back from Rollins, but when the time came for the match, "The Architect" said he was bailing. Lesnar tried to attack Rollins, taking him over with a German suplex, but the new WWE Champion landed on his feet, kicked Brock in the head, and turned tail.

Lesnar was so furious that he took out a cameraman with an F5. He then turned his attention to the announcers, beating them all up and levelling Michael Cole with an F5 that kept him off TV for two weeks.

It was a rare rampage, even for "The Beast."