This television episode refers to:
June 11, 1986
Michael rigs a dummy in his office so that no one will know when he is there and when he is gone. He tells Dwight "This is a dummy, a la Ferris Bueller's Day Off. We have tied a string to the wrist, which goes to the door. When somebody opens the door, the hand goes down, hits the remote, turns on the tape recorder, which is me snoring. Now nobody knows whether I am here, or whether I am gone.".