motion detectors security

Not sure if this is a ghost or not, there are several of these caught by security cam. BEFORE you say it's car lights, there IS one with car lights on it, and the 'ghost' or whatever it is, is STILL there. No, it is is NOT a bag. When we looked out the back window, there is NOTHING there. I do NOT know what it is. This is something unusual that I decided to put up here.

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