Dancing Around the Four Sides

AFAIK he's one of those actors who stays resolutely in character when he's filming a movie and I think he keeps the accent of the movie when he's filming interviews for it, as well.

But I really came here to add that if you have the same puerile childish sense of humour that I have, you will enjoy this dance remix of a meltdown he had on set a few years ago. Srsly.