See, working for the greater good flies out the window when you start considering the possibility you might create a singularity and destroy spacetime itself. It's for the best that no one mentions this to Steve. He would probably go ahead with it anyway, but he doesn't need the additional tension in his life.

It's not until they're halfway across the lawn that it hits him that this is a one-way trip, no matter how you slice it, and he pauses in his tracks. It may look like he's just studying the armor Tony's set up, but he's not really seeing much of anything that's actually in front of him. He's seeing the nose of an aircraft tearing through fluffy white clouds as it plummets toward the arctic sea.

"Steve?" Natasha puts her hand on his elbow, and he shakes himself out of it.

"I'm all right." He smiles weakly, then gives in and hugs her. Thor gets an armclasp, next, and then a few uncertain fist-bumps are exchanged between him and the others.

He comes to stand beside Tony, eyeing the armor that's apparently for him with blended awe and trepidation. "It's beautiful," he tells Tony. He'll ask whens and whys later.

He's going to need some kind of direction, though, if he's meant to get into the suit.