Michael R. Roskam‘s Bullhead is unquestionably a film about physical transformation and eventual deterioration. The Oscar nominee for Best Foreign Film centers on Matthias Schoenaerts in a star-making performance as the unhinged and undeterred Jacky Vanmarsenille, a cattle farmer with too many secrets to count. Most of them are obscured by his raw power and terrifying size, and Schoenaerts had to beef up considerably to the play the role. The actor had to add roughly sixty pounds of pure muscle to his frame – a feat that seems all the more impressive when you see a non-Bullhead Schoenaerts, who is considerably less beefy (and far less terrifying) than Jacky.

But how to did Schoenaerts pack on the muscle essential to playing his role? And just how much did the strain of that gain impact his actual performance? In an exclusive special feature clip from the new home video and digital release of Bullhead, we learn a little bit more about what fueled Schoenaerts’ transformation – and it’s one hell of a change. Learn how to become a Bullhead with a not-as-supple-as-he-used-to-be Matthias Schoenaerts and 2,400 tins of tuna fish after the break.

Bullhead is now available on DVD, Blu-ray, VOD, and digital download through Drafthouse Films.