Correct, Lynne. For an instant, I feel as if I'm actually standing in the past, and then I'm back again. No lost time, it's not a memory or a memory trigger like an odor. It only lasts a fraction of a second. No lights or other special effects. It's as if one or two frames of a movie were replaced with frames from much earlier in the film.
As I said in the original post, while this is very intriguing, I'm not convinced yet that it's not a psychological effect, i.e., "wishful thinking" or somesuch.
Would be fantastic if it's real.