#3 Triple H defeating CM Punk during the 'Summer of Punk' (2011)
This entry essentially covers everything that happened to CM Punk in WWE after Money in the Bank 2011. Because this could be a list of its own, if branched out. The Voice of the Voiceless was on top of the world when he won the WWE Championship from John Cena and "left" the company.
However, his stock drastically fell over a few months. He was pinned on four consecutive pay-per-views, following some baffling circumstances. A month after a returning Kevin Nash cost him the WWE Title, the Chicago-native would be soundly beaten by Triple H at Night of Champions.
First off, Punk was the heel in this feud despite the fans being completely on his side. Nevertheless, he was the hottest star in the company and was fed to the part-timer. Triple H did not need to win, at all. He essentially squandered all of the momentum The Second City Saint garnered over the 'Summer of Punk.'
This remains a ridiculous decision, without much explanation behind it. CM Punk would go on to be pinned by Alberto Del Rio and The Miz on pay-per-view, before finally winning the WWE Championship at Survivor Series in November. He was a big star that should have been bigger.