This wavy floor is actually a mind-boggling optical illusion that discourages people from running down the hallway (in fact, the floor is a completely flat surface!).
Manchester firm Casa Ceramica used a neat combination of black and white tiles to make the floor along the hallway look as though it is uneven making the tiles appear to slope away into a dip.
The illusion only works in one direction, so you will be perfectly safe on the way out.
The making of the floor.
Many visual illusions have already been used to try and slow down traffic like this 3D-painted zebra crossing trialed in Iceland that provides an illusory effect of white blocks floating over the road.
