Speaking to The Independent, she said:"Sometimes I genuinely get really, really scared. Do you know the monsters the Weeping Angels? Well they freak me out so much, 'cause they're just like, 'Aaarrrgh'."
She added: "[The Angeles are] so freaky, aren't they? They're actually in the last episode I'm gonna be in. So that was really scary."
She went on to talk about her exit from the show: "I honestly wanted to go on my gut instinct with the whole leaving thing, and I just had a rough idea of when would be a good time for me to go 'cause I wanted to go on a high," she said.
"I didn't want to stay in it too long and outstay my welcome. And I wanted to take the character as far as possible before it started getting a little tired.
[Source]

