We were even able to install an interactive floor in an interior of a private apartment. A wooden bridge, which loses its parts after passing it accompanied by a sound, was complemented with an animated 3D substrate of an abyss. The client, after passing across the bridge, falls down into a deep gorge accompanied with sound effects. Since the ceilings are low and hallway is narrow, it was necessary to use two projectors which are shining in one place.