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Mist Shadow  imaged by Erika Valdueza in Atlantic City, New Jersey June '08.
Image ©Erika Valdueza, shown with permission.

There are several odd looking features. The shadow looks higher and wider than the building. The shadow helicopter appears to overhang the building more than the real 'copter.

It's all due to perspective. The shadows are cast by near parallel sun rays into a layer of mist lower down the building. The shadows are the same size as the objects casting them but appear larger because they are closer to the eye and camera.