She ALMOST backs out, even as she feels the pressure of apparent ground under her extended foot. LOOKING at all the empty space under her unprotected feet is just...

So she doesn't. She looks up at the building and slides one foot fully off the edge, shifting her weight onto before finally pulling the other foot off the ledge.

She takes a few measured steps before turning back to face him, before taking a glance at the enormous gap between her and the ground.

"Okay, this is highly intimidating without rocket boots, must admit."