In "Commentary! The Musical," a special musical commentary for "Dr. Horrible's Sing-Along Blog," Nathan Fillion, Neil Patrick Harris, and Jed Whedon sing a song about a game they played on set called Ninja Rope. One of the verses is as follows:
All:Therefore, in this blog entry, with the picture at the top of it as proof, I would like to announce that I am officially better than Nathan Fillion at something. Take that you talented, funny, good looking, successful actor who has been in two of my favorite shows. I know you won't be able to sleep at night now (when this news inevitable reaches you. And it will. Oh believe me, it will.)
Careful as you hurtle from one circle to the next.
Sometimes double back to dodge the gravity vortex.
Two ropes is the key to keep from wheeling way too far.
Nathan holds the record.