Viggo Mortensen Breaks His Toes

While filming The Lord of the Rings trilogy, Viggo Mortensen (who plays Aragorn) improvised an agonized reaction to "finding" his hobbit buddies burned in a pile of bodies. Mortensen kicked a helmet in disappointment, but it turned out to be much heavier than he expected. The actor broke two toes with the kick and his agonized scream was so authentic, the take was used in the final cut of the film.