It's easy to view SummerSlam as the redheaded stepchild of WWE's "big four" pay-per-views. Unlike Royal Rumble or Survivor Series, it doesn't have a dedicated stipulation or theme (other than "hey, it's the biggest party of the summer"), and WrestleMania pretty much speaks for, and sells, itself.
However, that's not to suggest that SummerSlam hasn't seen its fair share of significant moments. A key part of WWE's long history, the show has always been one of the highlights of the calendar year - due, in part, to its affinity for shocking moments.
WWE often enters something of a lull in the months following WrestleMania, but such a dip is often sparked back into life by a shocking turn of events at WWE's annual summer extravaganza. From surprising swerves to wince-inducing moments of brutality, SummerSlam often brings with it an unforgettable incident or two.
Of course, these moments don't always have the desired effect, but they at least get people talking and remain etched in our memories many years later. As we approach 2017's edition of 'the biggest party of the summer', here are the 10 most shocking WWE SummerSlam moments of all-time.