During the episode, this poor woman has her purse stolen by a crook on the street.  Fortunately, Raphael and Casey Jones manage to get it back, but when they try to return it the old lady finds them more terrifying than the purse snatcher.  Have fun with this voice, if you'd like to use an accent you can, the most important part is to make it fun and full of energy.  I may also consider you for future parts if you're interested.  Good luck!