The Day of the Doctor - S7-E16
Clara: Doctor, what's going on?
Eleventh Doctor: It's a... Uh... Timey wimey... Thing.
The Doctor: "Timey" what? "Timey wimey"?
Tenth Doctor: I... I have no idea where he picks that stuff up.
The Day of the Doctor - S7-E16
Eleventh Doctor: Gentlemen, we're ready. [Straightens bow-tie, throws lever on his TARDIS console.] Geronimo!
Tenth Doctor: [Theatrically throws lever on his TARDIS console.] Allons-y!
War Doctor: [Works controls on his TARDIS console, disgusted.] Oh, for God's sake! Gallifrey stands!
The Day of the Doctor - S7-E16
War Doctor: Anyone lose a fez?
Tenth Doctor: You! How can you be here? More to the point, why are you here?
War doctor: Good afternoon. I'm looking for the Doctor.
Tenth Doctor: Well, you've certainly come to the right place.
War Doctor: Good. Right. Who are you boys? Oh, of course, are you his companions?
Eleventh Doctor: His companions?!
War Doctor: They get younger all the time. Well, if you could point me in the general direction of the Doctor...
[Tenth Doctor raises his sonic, and then Eleventh Doctor raises his.]
War Doctor: Really?
Eleventh Doctor: Yeah.
Tenth Doctor: Really.
War Doctor: You're me? Both of you?
Tenth Doctor: Yup!
War Doctor: [nods disbelief toward the Eleventh Doctor, as he looks at Tenth Doctor.] Even that one?
Eleventh Doctor: Yes!
War Doctor: You're my future selves?
Tenth Doctor and Eleventh Doctor: [in unison.] YES!
War Doctor: Am I having a mid-life crisis?
The Day of the Doctor - S7-E16
War Doctor: There's still a billion billion Daleks up there attacking
Eleventh Doctor: Yeah there is, there is.
Tenth Doctor: But there's something those billion billion Daleks don't know
Eleventh Doctor: Because if they did they'd probably send for reinforcements
Clara: What? What don't they know?
Eleventh Doctor: This time there's three of us.
The Day of the Doctor - S7-E16
Rose: Oh, look at you, stuck between a girl and a box. The story of your life, aye Doctor?
The Day of the Doctor - S7-E16
War Doctor: Hello? Somebody there?
Rose Tyler: It's nothing. It's just a wolf.
Chosen answer: 1) When Stephen Moffat took over he ignored a lot of what had been developed before (there is not in-universe answer). 2) It would have killed Rose, so the Doctor absorbed the energy. His body regenerated before the energy could do a significant amount of damage that would prevent regeneration.