While making The Rock, he specifically told Michael Bay to piss him off a lot to help get him into character. There's footage floating around of Harris and Bay getting into some spectacular fights on the set of that movie, then immediately afterwards Bay yells "ACTION!" and Harris does his thing. Method acting indeed.
That might be understandable if Harris wasn't attending a press conference publicizing his own movie at the second biggest film festival in the world. The only violence happening here is that clip he's unloading into his foot.