But every vertical surface is covered in contemporary, Impressionist art.
"It's amazing, all these figures twisting and falling and pouring through this vertical surface".
You can even train them over both planes: first across the ground and then up a vertical surface.
Levels can also be used to indicate whether a vertical surface is perpendicular, or plumb, with the horizontal plane.
The architects' solution was to illuminate almost every vertical surface around the entrances to the hotel.
The rudder is a vertical surface, and it controls movement around the aircraft's vertical axis.
Wall runs are easy to set up via an angled sprint toward a vertical surface and a deft tap on the jump button.
It has a thick consistency so it can stick to a vertical surface (called vertical cling) without running down to the floor.
Robert Malcolm, a Fire Department captain in Asbury Park, N.J., said that urethane foam insulation burns much faster when it is attached to walls or any vertical surface.
In the opening scene, the planks undulate to suggest the waters of the Rhine, then become a vertical surface on which watery imagery is projected.
Spending the day with your arm outstretched, manipulating tiny controls on a vertical surface is awkward and exhausting.
