As a plate blew up, Prue jumped a bit. "Okay, all right. Hands down, hands down." Prue understood why Piper had just snapped at her, so she didn't take it personally. "You know that's not the answer, Piper. It takes time to get used to a new power, remember?" It was a standard answer, but it was the best she could do for the moment.
"I don't think you could blow us up even if you tried. Remember you can't freeze us? I would think the same thing applies to your new power." Prue said, using some logic. It may or may not have the desired calming effect, but she was trying. At Piper's question, Prue couldn't exactly answer. Piper had still been in the adjustment stage when she came here. "I think you should ask Phoebe that. You were still adjusting to it when I arrived here. But I'm sure you did. You are strong and smart. Remember it took you a while to get a handle on your freezing power? I'm sure it's the same situation with your blowing up power. Just do your best to stay calm. And keep your hands down."