Oh my, a foot of concrete! Sounds like the spec for oldschool electromechanical telco central offices, when they were filled with heavy racks full of whirling rotary switches and relays.
Re. jumping in the air: Probably not far enough in the air to actually land on top of a dryer, but enough to walk across a floor fast enough to squish a dryer against a masonry wall (mass and inertia).
The direction it walks is based on the direction of spin. Spin clockwise, walks to your right. Spin counterclockwise, walks to your left.