20 Things You Didn't Know About Serenity

14. A Lot Of Actors Did Their Own Stunts

The majority of actors did their own stunts, including Nathan Fillion, Chiwetel Ejiofor, Sean Maher and Summer Glau.

Whedon has said that he encouraged this, as it would help achieve a practical, tactile quality that the original series had.

Not only that, but it would also help cut down production costs.