"Clearly not planning ahead." His sass is so understated it's almost normal, but no, that is still definite sass given the default tone he takes otherwise. He pops the door open and glances up and down the hall before setting off, waiting for her to exit so he can shut the door quietly behind them. Stairwell door spotted, he leads the way swiftly and.. of course it's locked, but he jimmies it with the card (it doesn't unlock immediately - this must be a security stairwell) and pulls the door back, keeping his distance at first while scoping it out. A moment later he closes it.

"Camera," is his explanation, and so he approaches the window at the end of the hall, looking for - aha. The little red plastic pull-tab at the bottom corner.

So, literally, a fire scape. He grabs and yanks it, and the window neatly swings out, revealing a slim steel series of terrifyingly spindly platforms and ladders down the side of the building.