Please post a pic, link, or attached sketch of the 'look' you mean;
Right now, I have noticed that kyle has a normal duck key. With this key comes 2 animations: forward_duck and backward_duck. I am creating a similiarly 'new hotkey' - "Crawl" with 2 new animations: forw_crawl, and back_crawl. Both are the close to the wall, hand over hand (leg over leg) motion, but in diff directions. Im not sure if i can 'add' the animation you speak of.
However, that 'could' be an idle animation when spidey is attached to the wall maybe. ( aka, if spidey is idle and is attached to wall, then he reclines his body back and looks around the area ).
I dont know how hard this will be yet, until i complete the 2 anims ive started.
Perhaps zeq can throw his input in; im still unsure on how to leave kyle/spideys right hand (since it will also be used to shoot guns, etc, while he is in crawl position) [ aka, since u can hold duck key and fire gun, im working on same premise, wallcrawl and fire gun ]