It takes a certain kind of person to be this intimidating while out in public in nothing but your underwear but Conor McGregor pulls this off with ease. 

McGregor and opponent Diego Brandao weighed in yesterday in front of 5,000 fans in The O2 ahead of tonight's fight and, as you might expect, the atmosphere in the arena was something to behold.

Speaking afterwards, UFC president Dana White told us: "I've been doing weigh-ins for a long time. Big ones in Vegas, big ones everywhere. That was insane. That was the greatest weigh-in I've ever been to. This country is [fantastic] at supporting their guys when they do something. It's pound-for-pound one of the loudest places I've ever been. There's going to be 9,500 people there tomorrow but it's going to sound like 90,000."

It, as they say, is well and truly on.