"Thing about me, I'm stupid. I talk too much. Always babbling on. This gob doesn't stop for anything," the Doctor said as both Daves approached menacingly, "Want to know the only reason I'm still alive? Always stay near the door." He pointed his sonic screwdriver at the floor. A trapdoor opened beneath his feet. He smiled and waved his fingers at Proper Dave. "Bye!" He let himself fall. He flipped and flew away, swerving, twisting, and diving happily.
"I've seen whole armies turn and run away, and he'd just swagger off back to his TARDIS and open the doors with a snap of his fingers," River said dreamily, "The Doctor . . . in the TARDIS . . . . Next stop, everywhere."
"Spoilers!" the Doctor said, hearing the end from the top of a flight of stairs on the other side of the room. He hopped and floated down the steps.
"Skipping stairs again, are we?" River said.
"Come on, you can't walk down the steps if you can fly," the Doctor said as he landed, "You must skip steps too."
"A bad habit I learned from you."
"Well nobody can open a TARDIS by snapping their fingers. Doesn't work like that."
"Come on." The Doctor turned and walked away. "Next chapter's this way."
The Doctor and Donna walked up the steps without a word, neither wanting to talk about their experiences, but both understanding the other perfectly.
The Doctor stopped. Without a word, he turned and flew down the steps as fast as he could. He planted his feet on the ground, but he slipped on the marble and crashed into the railing. He grabbed River's screwdriver as he stood up. "Why? Why would I give her my screwdriver? Why would I do that?" he asked himself, "Thing is, Future Me had years to think about it, all those years to think of a way to save her. What he did was give her a sonic screwdriver. Why would I do that?" He slipped open a panel revealing a neural relay. "Oh, oh, oh . . . . Look at that! I'm very good!"
Donna ran up to him. "What have you done?"
He showed her the relay, beaming. "Saved her." He jumped and flew through the Library. He flew as fast as he could, avoiding shelves and flying over desks. "Stay with me! You can do it! Stay with me, come on! You and me, one last flight!" He reached the gravity platform and buzzed the sonic screwdriver at it. "Sorry, River. Shortcut."
"Platform disabled," the computer said.
The Doctor dove in. He pinned his arms to his sides, falling as fast as he could. There was only one bar left on the neural relay. He reached the end of the shaft and spread his arms. He rocketed toward the terminal. He planted the screwdriver directly in the hole, uploading River into the data core. Charlotte smiled at the Doctor and he smiled back.