The way he'd come still looks stable, if he casts a glance over his shoulder. It's not a comfortable hike. But none of this has been. He'd reach back and offer her a hand up if he thought it'd be enough to bridge the gap between them. Just to offer her something stable to grip. He does have the reach...

"If you can take the load, I can reach in. Can you do that light thing and hold the brace?"

Shepard's smaller, sure. But his reach is better. It'd be smarter, from what he's seeing, to reach a limb into the mess, rather than a whole person. If something falls, then it's a matter of a broken arm, not a broken skull. He thinks he can see something moving. Reaching upward.

"Space is big enough for my arm, but, I think if I lift it up more it's going to start falling."