"Oh, that's very bad," the Doctor says. He doesn't reach out and touch the altered time in the way Hiro did, he's not entirely sure he could take the twisting of time around him. This, right now, is difficult enough.

"Someone's taking the combined powers of the residual human psychic energy and using it to fuel this obstruction in time. Why?"

He lowers the device so Hiro can see it, too. It's blinking in red, the little swirly Gallifreyan language telling the Doctor that time is very, very fouled.