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"If we do this, it changes everything; there'll be no going back."
Nat's expression was cold and emotionless as ever, the way a spy's face should be, but her eyes gave her away, because this meant more than she would ever actually say, and Clint knew it, which is why his response was entirely non-verbal.
Pulling back, he fired the arrow into the lock, watching the mechanics scramble and the electrics spark, before the heavy door finally slid open to reveal the cryogenic chamber containing the Winter Soldier, a.k.a. Nat's ex-lover, Bucky Barnes.