Opened Window 

Opened Window, adj. is the term used to describe the amount of time available before the authorities arrive on the scene after a riot, protest, prank, graffiti or crime has been committed. Let me know when the coast is clear because the opened window is a short amount of time.

They knew they had an opened window of 3 minutes to spray paint that statue and leave before the cops came. Time span intentional act unexpected prank well timed protest rehearsed acts planned riot

Opened Window by Amazingman April 20, 2013