Utilized mercilessly in chapter 10 of Red vs. Blue: Revelation by Tex. For extra laughs, all six seven groin blows in the episode were focused on Grif alone.
Grif: What is your problem with my balls!?!
(later, after the final groin attack from falling down crotch-first on top of a concrete divider... )
Grif: Why don't you just... kill me?
- Seven? I counted eight, possibly nine.