"Oh, all the time." Alek makes it sound like it's an every day thing, and - well, it kind of is. "Back in my world, we have these wormholes they call rifts. They don't work too differently from the Door. As far as scientists know, it's holes in the fabric of the universe, and people fall through these 'holes' all the time."

Or, they did. Alek doesn't know the world eventually ends, but he never wants to.