It's not unusual for a mixed martial arts (MMA) fighter to claim they would kill their opponent inside the cage (sample), but it's not really a big deal because it's all talk, as no one intentionally tries to earn 25-to-life for televised murder.
Then again, you never know.
Especially when we're talking about former UFC welterweight Rousimar Palhares, who has a long and ugly history of injuring his opponents. Combine that level of sadism with the skinny legs of Conor McGregor and we could have ourselves a medical emergency.
"I would consider returning to the UFC just to fight McGregor.