It's one thing to perform a movement that you initiate with your eyes closed, but athletic environments generally aren't that convenient, so Moltzan's trainers work on teaching her body to react to unforeseen changes on the mountain.
To test your own reactive abilities, stand on an unstable surface (core board for beginners, Bosu for advanced). Lift one leg up in front of you so that you're balancing on one leg. Close your eyes. Have a partner lightly tap different spots on the side of the Bosu to throw you slightly off balance. Try to regain your balance without opening your eyes. Try to maintain your balance for 30 seconds.
Training tip: Doing this barefoot helps train the proprioception in your toes and feet, while wearing athletic shoes trains your ankles. Doing this in ski boots trains your knees and hips. Moltzan does all three (of course)!