4. Rey Mysterio Gets His Eye Put Out
So yeah, Rey Mysterio lost an eye. It took a long exchange of wrestling moves and holds between he and Seth Rollins, but eventually, Rollins managed to use the corner of the ring steps to extract Mysterio's eyeball from its socket. Think that's called a callback.
The aftermath told the story. A disgusted and disturbed Rollins began throwing up at ringside. The faux fans began lightly slapping their hands on the plexiglass to express their boundless rage. The distraught commentators could barely handle the segue out of a Last Ride commercial. Madness.