Firefly - Jayne Cobb Pop! Vinyl Figure Jayne Cobb, the muscle on Serenity. Along with the rest of the crew they deliver questionable cargo around the universe for a fee, which inevitably ends in some sort of altercation. Proudly brought to you by Popcultcha, Australia's largest and most comprehensive Pop! Vinyl on-line store. Click here to see more of our great Pop! Vinyl products.