I can't name just one...so I'll list my top ten in no particular order

1. Randy beating up Sylvia for 5 rounds and particularly almost getting the stoppage in the 1st

2. Roger Huerta vs Leonard Garcia. Kind a mid-level fight but an absolute barn burner that I'll never forget

3. Fedor's finishing of Randleman after almost getting his neck broke. The armbar in the 1st Coleman fight and beating Fujita after almost getting his head knocked off are a close second and third.

4. Gonzaga blasting Cro Cop

5. Rampage knocking out Arona with the sickest slam ever

6. Anderson saving his title with the last round triangle on Chael

7. Royce in UFC 1-3

8. Diaz vs Gomi was an epic fight

9. Wanderlei vs Chuck...all be it several years too late

10. Vitor blitzing Wanderlei before we even knew it meant something.