I saw this castle episode and died laughing. I replayed it because I loved it so much. If you ever watch his series castle, he actually gets a few good jabs in about firefly and what's even cooler, some of the firefly cast make guest appearances. "That Joss Whedon show."
Keep Calm and Grr Argh! Nursery Art - Joss Whedon Inspired - Choose Your Background Color 8x10 Inch Poster Print. $12.00, via Etsy.