When the Evil Queen visits Snow White a second time holding a basket full of combs, she walks up to Snow White barefooted. She asks to sit down, and when she gets up she's wearing shoes. She leaves Snow White barefooted yet again.
The shadow of the camera can be seen at the bottom of the Evil Queen's dress as she arrives a second time to kill Snow White. This appears at the scene's opening, with the Queen looking at Snow White before crossing the bridge.