A man who simmers with a black, all-consuming rage. A man who has a special room in his house with thick padded walls where he can just unleash this primeval rage. Unleash it until he is exhausted, clawing at the walls, sobbing... Roy Keane is back and he's angry at Jose Mourinho.
During his post-match interviews after the 1-0 win over Rostov in the Europa League, Mourinho expressed his ire at United's fixture congestion, saying that the club had "lots of enemies" and that United will "probably lose on Sunday" away at Middlesbrough, saying: "We played 11 matches in the last six weeks and it's going to get worse and it's going to get easier for the other teams. I think they [the authorities] don't give a s**t about the English teams in the Europa."
Appearing as a pundit on the ITV Europa League highlights show, Roy Keane was... well, Roy Keane was Roy Keane-ish about the whole scenario.
"I've never heard so much rubbish in my life," he began. "Why do we have to listen to that garbage? It's utter nonsense what he's talking about.
"He's the manager of Manchester United, one of the biggest clubs on the planet.
"The squad he's got, the players... and he keeps moaning about fixtures and fatigue."
And the former United skipper wasn't done there, either.
"We were just looking at some of the cup fixtures they've had. They've had an easy ride in the cups, some good draws, a lot of home draws.
"The guy's talking absolute nonsense and I've never hears so much rubbish in my life.
"Maybe the club's too big for him? He can't deal with these demands at the match - what matches? Man United reserves could've won that game tonight."
Hush sweet Roy... you have nothing left to fear.