'South Park' creators Trey Parker and Matt Stone are widely heralded for their cutting creative style, but the two accidentally included some less-than-original material in a recent episode, CNN reports.

The pair, whose October 20 show parodied box office hit 'Inception,' inadvertently borrowed entire jokes from a CollegeHumor spoof of the film by writers Dan Gurewitch and David Young.

Following a blog post by Gurewitch, in which he accused 'South Park' of lifting lines from the CollegeHumor skit, Parker and Stone quickly apologized, saying that they had not consciously stolen the material.