Is the Doctor trying to be David Attenborough?
"Isn't it bad if I meet myself?" "It's potentially catastrophic."
... It's fairly obvious that the reason they've gone into Clara's boyfriend's past, not her own, is because she was thinking of him while she was hooked up to the TARDIS.
"So... plan? Plans are good."
"He took my bedspread!" "The human race. They're never happy."
"This is your army." "Plastic army." "Sit!"
"Can you read me a story?" "Once upon a time." *poke* "The end."
"I am trying to have a date! A real life, actual, human date!"
"The TARDIS isn't supposed to come this far, but some... idiot... turned the safeguards off."
"Did we really come to the end of the universe because of a nursery rhyme?"
(And then the satellite went out for 5-10 minutes)
"You don't want to meet yourself, it gets really embarrassing."
"What if the big, bad, Time Lord is just afraid of the dark?"
"No! No! Not the hugging!"