Optical Illusion

If you go into this elevator, i bet you will shock or nervous. There is a sign at the entrance cautions everyone who goes in about the work in progress for elevator. Actually, the floor of this elevator has been painted with an illusion to make people see there is no floor. What a big joke! Maybe you can ask your friends to close their eyes and bring them go into this elevator and ask them to open the eyes to look on the floor.

Source: Painted Elevator Floor