I think he meant Medusa. She can't turn them to stone... so... what would happen?
Correct she had snakes for hair too. If you stared at her she would turn you into stone. Oh I love this kind of stuff. I believe she was in the first season of Sarah Jane Adventures. I saw the first season on Sci fi channel. Now? I can't. So the question at hand. Hmm bet they'd both be destroyed?