The British are Coming.

You and your friend go to a nice park in Washington, DC. Bring a map of the city, 2 rolls of duct tape and a flag of Great Britian. Wait for a nice man walking alone to stroll by. Approach him holding the map but hiding your rolls of duct tape. Ask the man politiely if he knows what direction Big Ben is- When he looks at you all confused -quickly circle him and wrap him in the duct tape nice and tight- Then go grab your flag and duct tape it to his head. Whisper in his hear "The British are coming." Then take off.