On the other hand, unless its possible to really analyze what I was seeing - maybe in every case there was some kind of florescent light involved which never made an impression upon me.

But I do recall pointing it out to a colleague of mine and both of us being surprised at what we were seeing - & both of us being film & video people.

No, this has to be real. Anybody else see this before? This has to be a well understood effect by lots of learned folks.

RBG