It wasn't a raven but a rather large bird did spend the morning, and possibly the weekend, in the SJR Media Center.  Around 7:45am  the bird came out of the cooling vents and flew around perching itself on the light fixtures and even flying into the the suit of armor's mouthpiece.  Only after turning off all the lights and cornering him in the conference room did we realize that the screens were fixed to the windows and could not be removed.  For a couple of hours the bird tried to get out the window, found some bugs to eat in the lights, and was treated to hemp seeds and water.  Many students and teachers stopped by before the director of maintenance used a net (once used to capture baby ducks on the grounds) to capture the bird then carefully carried him down the stairs and let him go free!  The bird took off flying.