It started with a young boy who likes Batman wishing he could be Batman for a day. The police and firemen took on the project and ran with it. The police had the young boy dress as Batman then had a policeman also dress in up as Batman the put a logo on the police car and staged a robbery at a local bank. The two Batmen showed up to find a realistic looking joker in the middle of the robbery. Where they foiled the robbery and took the Joker in.
The Fireman set up a fake car bomb planted by the Riddler where Batman helped the police arrest the bad guy. This is one of the coolest use of public service ever. Here is the video below.