he who hesitates is toast

"Here," Vision murmurs, and passes the fruit container back to Tony, but his attention's on Bucky. There's an air of concern about him. "He means it," Vision tells him. "You should feel free to take the time to consider. We know that you weren't expecting this today."

Bucky shakes his head. "I was expecting it sometime," he says, quietly. "I knew you were getting close."

He draws a slow, careful breath. "What if it doesn't work? Putting it in place, I mean, not the block itself. Will it damage anything? In my mind?"