"This is Pepper Potts, you may leave a message after the tone." That's his Pepper, crisp and efficient.
"Hey, Pepper, it's me." This shouldn't be working; he's on the other side of a hole in the sky. "I just called to let you know that I might have to break that promise I made about not dying. I'm sorry, sweetheart. You know how bad I am at keeping promises. But you and mostly everyone else will be alive, so that's a fair trade. You should see the stars here; they're beautiful. Bye, Pepper. Love you."
Moments later, he starts falling.