the new rookie police officer was training on beat patrol by the senior police officer in charge sgt. harris,so rookie this is your first nite in the warehouse dist. yes the rookie replied. well then lets me show you the alarm protection systems these warehouses have. so the sgt. walks up to first door of the warehouse and knocks on the door and hears barking and says guard dogs. then he walks up to the second door and knocks and hears beeping and says electronic security system, then the sgt. starts to walk up to the third door when the rookie says let me do it so the rookie knocks and and looks puzzled and knocks agian and the same thing. so the sgt knocks on the door and hears loud snoring and says oh security guard.