think about it as several parallel planes of glass and instead of the world serpent eating its tail and being a perfect circle it jumps to the next plane of glass leaving the skin of the last and so on. if you look through the front of the glass it would look like its eating its tail and also that the worlds are combined. MK said the dreugh world is still there so thats how i see it. as for what it means for the head of the snake to leave your kalpa or plane i have no idea maybe the function of time.