[lowering his head a little; soberly] A meteor shower is what happens when the heart of a world has died. Then the barrier that protects the world breaks apart, and falls through space, and becomes meteors...
At least, where I come from. [he read a book that said differently, and he's used to the idea that other people think it's strange that he can just -- travel between worlds, so it wouldn't surprise him if that were different in many other worlds, too]