"Yes. Teleport safety is its own thing, I don't need to re-list all of it - the spell would be worse if I tried to pay individual attention to every single thing, because then I might miss something. But most of the time when ponies teleport they're teleporting themselves and they can either see their destinations or are pretty familiar with them, so an interworld teleport needs extra attention to things like not sending you if something unexpectedly dangerous is going on where you would be put, and not dropping you on top of a table or another person or into a pond."