I think perhaps she's pissed that she cant get up to see out of the big window. We just moved to a house built pre-civil war and it has these big shudders on the windows with the best views of the yard. She keeps going to the door where I sometimes pick her up to look out the window on it, and screaming her head off. She calms down when I hold her and let her look. Perhaps I need to figure something out about that.