Perfect symmetry

Generally, after I took the photos I would use a software 'ACDSee v.8.0' for some basic post-treatment and filing. There is a 'Effect' in ACDSee named 'Mirror', that it will horizontally overturn the left part (right, upper or lower part as well) of a picture, then tag the overturn part to the original picture to form a new picture which is perfect symmetry. I had used the 'Effect' to create some interesting pictures I thought.