Happening over spacetime, you mean :) I vaguely remember stories of this in a black hole. The "metric" changes. It involves the space dimension becoming time-l

Happening over spacetime, you mean :) I vaguely remember stories of this in a black hole. The "metric" changes. It involves the space dimension becoming time-like (restricted to movement forward) while the time dimension becomes space-like (finite). I don't remember the physical interpretations making much sense either.