The force of the explosion knocks her back a few feet before she seems to disappear entirely. Before the smoke clears, another quick blue blurr flashes where she had been moments prior to the explosion, and Lena reappears, blinking with a far off expression. Rewinding was always the most dangerous part of her technology, especially when there were enemies active in the area. If another Bastion came around the corner to fire, she'd be a sitting duck.

But any sound (aside from the fleshy sounds of the environment around them) is far off and not an immediate threat, so she lets her arms relax as she turns to offer a pleased smile in Jack's direction.

"Not bad, for an old man," she teases, keeping her mind off all the other unpleasant sounds filling the hallway. Whatever had happened to her leg is no longer of consequence, lost in time.