OK, it helps that there's a screen separating him from the exploding paint pellets, but still - to not even blink is a bit of an achievement. Matt is THAT cool and "unflappable"... To quote a YouTuber: "James should've used a turkey with sunglasses and a hat on it to scare him."
We're not sure what William H. Macy and Don Cheadle got chucked at them while behind James Corden's 'Flinch Screen', but judging by the debris they got away lightly. That and they didn't make the final internet cut, so that says it all really.