So fun fact: in the scene near the end of Fellowship where Aragorn is fighting the big Uruk dude, when the Uruk throws his knife and Aragorn deflects it with his sword, what was actually supposed to happen is that throw was supposed to go wide but the monster makeup was obscuring his vision and he ended up throwing his (very real) knife directly at Vigo Mortensen who caught it with his sword and knocked it away out of pure instinct. It was so awesome that they kept the scene for the final movie.