Penny waits patiently for Wanda's response, then perks up immediately once she receives it.

"Wonderful!" And then, in response to Wanda's question: "I'd like it to fall outward, away from the rest of the rubble. It'll spread the mess out more, but there should be less risk of it knocking something else over."

While she sounds confident in her reasoning, she still looks to Wanda for confirmation. She's never actually knocked a house down before! She's not sure if she's missing something.