These moments are going to be a bit different. I forced myself to only pick one for each Doctor.
>
Do you know like we were sayin'? About the Earth revolving?
It's like when you're a kid.
The first time they tell you that the world's turning
and you just can't quite believe it 'cause everything looks like it's standin' still.
I can feel it.
The turn of the Earth.
The ground beneath our feet is spinnin' at 1,000 miles an hour
and the entire planet is hurtling around the sun
at 67,000 miles an hour, and I can feel it.
We're fallin' through space, you and me,
clinging to the skin of this tiny little world, and if we let go...
That's who I am.
***
Lazarus: You're so sentimental, Doctor. Maybe you are older than you look.
The Doctor: I'm old enough to know that a longer life isn't always a better one.
In the end, you just get tired; tired of the struggle, tired of losing everyone that matters to you,
tired of watching everything you love turn to dust.
If you live long enough, Lazarus,
the only certainty left is that you'll end up alone.
Lazarus: That's a price worth paying.
The Doctor: Is it?
***
Martha: All you have to do is open it and he's back.
John Smith: You knew this all along and yet you watched while Nurse Redfern and I-
Martha: I didn't know how to stop you! He gave me a list of things to watch out for but that wasn't included.
John Smith: Falling in love, that didn't even occur to him?
Martha: [beat] No.
John Smith: Then what sort of a man is that? ...And now you expect me to die?!
***
New Doctor: 'Cos I'm a-- complicated event in time and space,
must've rippled back. Converging on you.
Donna: But why me?
New Doctor: Because you're special.
Donna: Oh, I keep telling you: I'm not.
New Doctor: No, but you are, you...
(looks at her as if he's only just realised)
Oh... you really don't believe that, do you?
***
Basically? Run.