"So. How do we get down there?" Clara asked, looking down at the burning, smoking ash planet, "Can you fly us down there?"
"Yes, but we're not going without the TARDIS!" The Doctor closed the doors. "She's turned off practically everything, except the anti-gravs. Guess what I'm turning off?" He buzzed the sonic screwdriver at the console.
Clara screamed as the TARDIS plummeted.
"Maybe it's a secret entrance to the tomb!" Clara echoed River, believing the Doctor couldn't see her.
The Doctor tapped the sonic screwdriver against his forehead, frustrated that he hadn't thought of it. "Yes, of course, makes sense." He turned away from the advancing Whispermen to buzz the sonic screwdriver at the gravestone bearing River's name. "They'd never have buried my wife out here!" the Doctor added.
"Your what?" Clara questioned.
A trapdoor opened beneath them and they fell. The Doctor grabbed Clara and tried to fly. He felt the air, but he couldn't catch it. They crashed on the ground, groaning. The Doctor pushed himself up and helped Clara stand.
She grunted and wiped some dirt off her clothes. "Why didn't you fly us down softly?"
The Doctor quickly walked through the tunnel. "It's linked to my mind and my mind is in turmoil."
"So . . . you can't fly?"
"Maybe if I get enough adrenaline, but otherwise I'm earthbound," the Doctor said as he lit a torch with the sonic screwdriver.