I've never heard the term, but, reading at the link, my T talks about something like this. He uses it sometimes, with some people, but not as a "do-it-yourself" deal, as something he'd do in his office. The idea is that traumatic memories are experienced as if they are happening NOW and this technique can help you learn to experience them as something that happened "then" and they revert to being a more normal, less charged, kind of memory.
The reason he hasn't done this with me,......Is basically that I seem to be too hyper-vigilant to dissociate. For a person that had the opposite problem, I can see where you definitely would want someone around to guide your "trip". About all we've done is talk about it. What it means, how it might work, what he'd hope to accomplish. For reasons I don't get, the very idea of being able to "watch myself" is kind of disturbing. And, maybe, that's a "thing" all by itself.
Anyway, heard of it, but not by that name. Apparently it's a real thing, apparently it can be helpful, but I'm not sure it's something you'd want to try on your own.