Zingano to Rousey has to be up there.
EDIT:
Okay, I'll make a top 10 based on suggestions.
1. Rashad-Machida (a.k.a. Shadface)
2. Anderson-Weidman 1 (a.k.a. Clowned)
3. Zingano-Rousey (a.k.a. Fail)
4. CroCop-Gonzaga 1 (a.k.a. CroCop'd)
5. BJ-GSP 2 (a.k.a. To The Death)
6. GSP-Serra (a.k.a. The Upset)
7. Forrest-Anderson (a.k.a. Humiliation)
8. Gus-Rumble (a.k.a. The Hometurf Fiasco)
9. BJ-Edgar 3 (a.k.a. Tippy-toes)
10. Brock-Cain (a.k.a. Breakdancer)
Honorable mentions:
Cain-JDS 1 (a.k.a. The Fox Fiasco)
Starnes-Quarry (a.k.a. Running Man)
Vinny-Perosh (a.ka. Gone in Ten Seconds)
Lindland-Vitale (a.k.a. Self-KO)
Big Nog-Mir 2 (a.k.a. Broken Arm)
Shogun-OSP (a.k.a. Skateboard)
Shogun-Sonnen (a.k.a Sonnen'd)
Reem-Bigfoot (a.k.a. Karma)
Tito-Randy (a.k.a. Spanked)
EDIT:
Okay, I'll make a top 10 based on suggestions.
1. Rashad-Machida (a.k.a. Shadface)
2. Anderson-Weidman 1 (a.k.a. Clowned)
3. Zingano-Rousey (a.k.a. Fail)
4. CroCop-Gonzaga 1 (a.k.a. CroCop'd)
5. BJ-GSP 2 (a.k.a. To The Death)
6. GSP-Serra (a.k.a. The Upset)
7. Forrest-Anderson (a.k.a. Humiliation)
8. Gus-Rumble (a.k.a. The Hometurf Fiasco)
9. BJ-Edgar 3 (a.k.a. Tippy-toes)
10. Brock-Cain (a.k.a. Breakdancer)
Honorable mentions:
Cain-JDS 1 (a.k.a. The Fox Fiasco)
Starnes-Quarry (a.k.a. Running Man)
Vinny-Perosh (a.ka. Gone in Ten Seconds)
Lindland-Vitale (a.k.a. Self-KO)
Big Nog-Mir 2 (a.k.a. Broken Arm)
Shogun-OSP (a.k.a. Skateboard)
Shogun-Sonnen (a.k.a Sonnen'd)
Reem-Bigfoot (a.k.a. Karma)
Tito-Randy (a.k.a. Spanked)
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