Well, there's this. [Rumlow said, running his fingers over the denser feeling tissue below.] Might be bone.

[They could be anything really, given this place, but the image that came to mind most immediately was a pair of wings. They seemed to be pretty commonplace, though primarily, he noted, amongst angels. The Soldier was a Limbo case though, so maybe that was why they hadn't come through?

Rumlow could guess all he wanted, the chaos of this place didn't mean he'd be right.]

Can't say for sure, but the only guess that makes sense would be wings. Be kind of neat, if they work.