I found this video on youtube:
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And I am sure there's a scientific (or engineering) explanation for it.
The video was taken by a security camera at a gasoline station. It shows a blue blob floating near the gasoline pumps for like 30 minutes. Then the blob moves, like Casper the friendly ghost, and hovers above the windshield of a car. Then it goes up and vanishes.
Some guy said the gasoline station is standing on what used to be an indian reservation (booooo). But I am sure it is a video flaw of some sort.
Anyone has a good explanation for this? I want to be sure of what's going on. This is not my idea of proving that ghosts exists by failing to find a rational explanation for this phenomenon.
Thanks for your help.