Fascinating
A different perspective to explore.
I believe in reincarnation, souls leaving when the body dies and being born again into new lives. One concept related to reincarnation is the concurrent existence of all lives one has lived or will live. Each time line in its own bubble of time. On occasion a door (not an actual door) can open that gives sight into another bubble and for a moment you are there in that different life. I visualize it as all the bubbles floating around and two come together, they merge at one place for a split of a second.
No facts here, just beliefs and some personal experiences.