So clearly they were not hearing what she was hearing. Shannon closed her eyes and allowed the whispers to seep into her mind so it was possible Loki could hear them through her thoughts. It wasn't only her thirst for vengeance that drove her. It was mostly her unease. Hoping that going through the door would stop the voices.
"It's hard to plan for something that has only been theoretical to me, it's not exactly described in the same way in any of the text." But what sort of planning could be better besides release her largest size and wreak havoc? Surely her size would count alone. "We could start from the center and work our way out?" Sure she could drop them both exactly where they wanted to be.