#3 Baron Corbin's failed cash-in
Prior to 2017, John Cena and Damien Sandow were the only two stars in WWE history to win the Money-In-The-Bank briefcase, and fail to successfully cash-in. Both instances were full-length matches, but neither resulted in a title change. In Corbin's case, he cashed in, and lost to Jinder Mahal in under ten seconds. Interestingly enough, it was reportedly due to real-life backstage heat with John Cena, as per the Wrestling Observer Newsletter. He rubbed the leader of the Cenation the wrong way and lost his world title push.
What really made it strange is the fact that it happened on the go-home Smackdown episode, right before Summerslam. Mahal had been in the main event against John Cena, and Corbin came out to attack both men. The bell rang, Corbin punched Cena, and then Mahal rolled up Corbin for the win.
What really made it all odd was the fact that Corbin had won the briefcase in a pay-per-view main event, yet he lost the briefcase in quick fashion, on a go-home episode of Smackdown.