This parody, done in a form of a song (with rhyming lines, no less!) talks about the plot-holes in The Dark Knight. Of course, none of them are really huge or detract from the movie but it’s still hilarious to hear such a spot-on exposé of the discrepancies.
Fave line? Probably “Joker, are you busy? Let’s call a truce. I need you to help explain the plot to….Batman”.