The Coen Brothers are known for injecting a heavy dose of quirky humor throughout their films, but it seems their dry wit extends to the end credit sequence as well: Buster Coen, the 15-year-old son of writer/director Ethan Coen, was listed as “Mr. Damon’s abs double” on their latest Western masterpiece, True Grit. That job title may raise confusion for those of you who checked out the film-Damon’s character LaBoeuf is never sans shirt-or have ever seen any of Damon’s body…of work (outside of The Informant! pictured above). Scott Feinberg brought the easter egg to Damon’s attention at a Q&A screening, but he was fully aware and accepting of the Coens’ inside joke. Apparently Buster served as an assistant to the Script Supervisor and requested he be listed under a job that carries a little more weight-or muscle-on set. As if you needed an excuse this thin, there’s now one more reason to see True Grit again before it rides out of theaters.