I guess this is the obligatory S#!T GETS REAL Chapter of Kazumi Magica. What episode 3 Done to Madoka is what Chapter 4 is doing to Kazumi.
Incubator Race? Check
Angsty Expressions? Check
Unexplained Secrets? Check
Girls Crying? Check
Puella Magi trying to Kill each other? Check
Puella Magi Corruption? Check
its about time Kazumi began to follow the Urobochi brand of storytelling. Of course, all of these can be a red herring and a happy sunshiny rescue happens next chapter but, the way things are, It's definitely running things Madoka style.