Frozen in Time
A friend sent this to me tonight, and I checked it out, and thought it was really fun. This (and evidently other events like it) are staged by a group called Improv Everywhere (Their tagline: We Cause Scenes).
For this scene, they had over 200 people freeze in place simultaneously in Grand Central Station for 5 minutes, while bystanders were unaware as to why or what was happening.
