This guy just lets people beat on him for his training. Insane …
You're weak, slow and don't stand a chance against a teenager right now. But compared to UFC champion Conor McGregor, you're even worse off. Just look at that ab training above — it's fucking insane.
The guy willingly allows someone to beat the crap out of him after doing sets of whatever intense crunches those things are for a living. This is his job.