Bucky takes the opportunity to drop the knife in a nearby trash can as she's trying to discover the secrets of what he assumes to be a weird screen-phone, but he doesn't take long.

"You're tellin' me," he says, leaning against the glass and folding his arms as he stares at the contraption. "Guess that might be part of the whole 'different planet' thing."

He knows how ridiculous it sounds, and he still has a really hard time believing it, but... well, he saw his best friend turn into a Captain America. It opened his mind a bit.