On the opening menu for the DVD, you have two options, to either Convert or Fight. The Easter Egg is available on both options. If you chose Convert and after the menu loads press the up arrow, you will highlight a part of the pedestal where Riddick stands in the movie. The scene available is a behind the scenes look between Riddick and the Lord Marshal. The scene is also available if you chose the Fight option; you just have to press the left arrow and highlight one of the knives to watch the same scene.