he who hesitates is toast

"It's not that I don't like it here," Bucky thinks to add. After all, he's a pretty large imposition on the Avengers, no matter how close a friend he is to Steve. "Or anything like that. It's just ... nice to get out, sometimes."

He's talking as he tries to place the next block, not paying enough attention to what he's doing, and whacks it right into the edge of the tower instead of placing it on top of it. Bucky swears in Russian under his breath as he watches it sway back and forth, holding the block in his fingers and waiting to see if the whole thing will settle or collapse.