Conker : Live & Reloaded Easter Egg - Lifesaving Cheese (not an egg)

Get to the back of the roof of the cheese farm. Jump across the gap until you see the lightbulb and hear the ding. Press B when this happens. You need to be quick, or hack the game to make it "slo-mo." The cheese will break, and there will be a tail under it. Jump on the tail and it will give you not one extra life, but ten.