Sulley discovers that laughter can save the company, as laughter is proven to be 10 times more powerful than screams. With that, Sulley takes the helm of Monsters Inc. as the new CEO. During the company’s first day of making children laugh, Mike and Sulley go to the simulation room to find Boo’s door put back together. Sulley enters it and sees Boo. At that point, the movie ends.