Popular Art Museum Escape

The city opened a new art museum. He became very popular, and you decide to visit it with your friends. You came and you liked all the exhibits, but one you will remember for a lifetime. This item is in a separate room and you went inside. Have you noticed that there are no people, but could not even imagine what this exhibit is a magical artifact. He was defending himself, locked you inside the museum in a parallel reality, where inside you alone.