I had a grappling-oriented fighter PC one game. He was a crazy thug that just liked brawling, wrestling, and bashing things with his 2x4 of frost. Our party ran into a medusa and her minions. Disregarding the fact it was crazy and stupid, my PC went right up, passed his Fort Save and proceeded to grapple and Pin the medusa (all occording to the RAW). My DM still gave the medusa opportunities to use her gaze on me after that. I disagreed, but he said they were practiced in techniques to make people look. My question is, if pinning results in immobility and lack of speech at the attackers option, could she still use her gaze attack? Thoughts?