So… here's what I think. I think Christina is the body we see impaled by a spherical piece of glass… ( I can see her long sleeve, gray t-shirt that she has on under her scrubs.) I think Derek gets hurt too, but I think Meredith is screaming because I think Christina may die… I don't think Rose is really pregnant, just desperate to hold onto Derek. The pretend pregnancy will slow down Derek and Meredith getting together… probably for all of season 5! Good grief!
Let me know what you think too! I can't wait!