I have a question. Do different sources of concealment stack?
For example, if glib was both hiding in the tall grass, and under some kind of effect (like that of his magic armor), would he receive heavy concealment?
Well, if there is no save for getting pushed into the web, the Starwinds was pushed into I19, leaving her immobilized from the web and facing the readied action from Shambler 1 (which, @ +7 to hit from prone and helpless, is likely to swallow her).