Haunted tunnel and discussion of orbs

I am not a real believer in orbs, but I have said that I might consider it to have some credence if no flash was used. I don't want to post this photo here, as it is not mine and I do not have permission.

The discussion on a photography forum of this orb is going on and there are various people trying to explain it.

This was taken with no flash. It *could* be a bit of dust reflected off the light behind the photographer. I don't know. I just wanted to hold up my end of my word that I would consider entertaining a non flash orb

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