“If it were entirely unmanaged,” Twilight said, “It could. Historically, there have been many cases of unicorns being killed from a mismanaged teleport. In this case, since Starswirl initially designed the spell to transport a unicorn a vast distance, he had the foresight to account for that. I'd need a chalkboard to write out the pertinent part of the spell, but in essence it shed a lot of excess energy by dumping it in the lake. That's why the raft was destroyed. If Lyra and Dale had landed on the ground, though. . . .”