There are so so many:
- Edge Spearing Jeff Hardy as he was hanging from the belt
- Shane getting thrown through the glass window by Kurt Angle at KOTR
- Triple H flipping Cactus Jack through the Cell roof in 2000
- Randt Orton hitting the RKO while Evan Bourne was in the middle of his Shooting Star Press
- John Morrison doing a moonsault to the outside while holding a ladder at WM
- Kurt Angle nailing the Angle Slam from a board set up on the top rope vs Shane McMahon
- Sable with the handprint bikini (ok ok not a REAL spot!
)
- Edge spearing Mick Foley through the flaming table at WM
- Randy Orton taking the bump into thumbtacks after his RKO got reversed by Mick Foley
- Undertaker jumping through the fire to get to Kane in the Inferno Match
- Shawn Michaels throwing Marty Jannetty through the glass window
-RVD knocking Jeff Hardy off the stage with a Van Daminator at Invasion 2001
- Kurt Angle going for a moonsault off the top of the cage
- Rikishi diving from the top of the cage onto Val Venis with a splash
- Jeff Hardy's multiple Swanton Bombs from ladders (can't pick just one)
- Undertaker chokeslamming Triple H off the tower at WM17
- Mankind falling onto the light/electrical tower and making the lights go out at Royal Rumble 1999 VS The Rock
- Shane McMahon falling from the titantron vs Steve Blackman
- Mike Awesome powerbombing Masato Tanaka from the apron at ONS 2005
- Jeff Hardy nailing a Swanton off the stage to Bubba Ray Dudley in the Tag Team Tables match at the Royal Rumble 1999.
I could go on and on!
But I would have to say the spot where
Undertaker threw Mankind off the top of the HIAC is my favourite . Although it was planned (unlike Foley's fall through the cage in the same match), the fact it was so shocking, unexpected and looked so devastating makes it my single most memorable moment in wrestling history. As wonderful as so many other things are, Mankind falling through the announcers desk from the top of the cell is always going to be number one.
It could have killed the guy, a slight mistake by Taker and Foley would have gone into the crowd, he could have landed on the TC monitors, he could have broken every bone in his body. It was unbelievable and even now when I see it I just think "OH MY GOD!"