9. “The One With Unagi” (Season 6, episode 17)

If Phoebe and Rachel possessed more Unagi, they’dnot have been so shaken by Ross’ jump scare.

Image: SCREENSHOT/WARNER BROTHERS

Any die-hard buddies fan understands that “One will need to have total understanding to protect oneself, ” or Ross’ secret weapon, Unagi, that he garnered over many years of karate classes.