In the scene when Sarah tries to escape from the hospital and carring the stick from the guard, she is running and you can hear the sound of shoes on a stone floor. But if you look at her feets: She don't wear shoes in this moment.
First of all, nice grammar in that last sentence. Secondly, the floor was certainly waxed, as it glistened in the moonlight. And if you have ever tried this, feet can sound like shoes on a waxed floor.