My girl always stays hissy the day of her shed, so I usually leave her be but I do take the shed out of the tank and check for poop which is common, though if its feeding time she will usually eat.
Cool that you saw it! Mine always sheds in her hide and then somehow the role of skin ends up at the opening. Weird too since the inside of her hide is smooth, I wouldn't think there would be enough friction but it works just fine.