As team leader of the Police Tactics and Rescue Unit, I directed officers late one night to strategic positions around a building where a dangerous suspect was hiding.  

Believing the culprit to be on the roof, I decided to have an officer shine his flash-light in that direction on my command.  

At just the right moment, I whispered to him, "Okay, throw a light on the roof."  

The officer hurled his flashlight to the top of the building.