Will O' Wisp

[Mercedes Benzene]

What exactly IS a Will O' Wisp.
Well, actually, no one knows.
So what do you think?

Please try to offer scientific explanations rather than supernatural. I just put this in strange claims since we don't have a definitive explanation yet.

Have you ever seen a Will O' Wisp?
If so, where? When? What were the conditions like?

[orbsycli]

Hrmmm... Reminds me of the green flash! 'cept more ghastly.

I've never seen one but I know I will. Until then...Anybody else?