Perfect Reflection

I took this shot when a took a break from walking up the steep incline of Powell Street in San Francisco.
In what looked like an abandoned building site (very rare for SF) there was this dirty pool of water filled with dead plants and branches. I thought the patterns of oil or chemical in the water along with the perfect stillness of the water would make for an interesting shot.
After reviewing my photos I was amazed at how the image reflected in the pool appeared sharper and more distinct than the real thing. There is something else about this image that seems interesting and holds my attention but I can't really figure out what it is.
At the least it's an unconventional photo.

Nikon Coolpix 5400, AV f 6.2
[click photo to enlarge]