Whirrrr....

I know of these chinese stress buster toys that you throw on the wall and it starts howling in pain and vibrates. Its pretty funny and a true stress buster...

I have this friend at Great Lakes who is like that. No, she is not Chinese (though she is definitely the size of the toy!) but she does behave just like the toy...

All you need to do is to get Miss N going by saying something remotely funny, and for a good half hour she will be rolling in laughter, vibrating all the way... 

The good thing is you get a good massage just sitting next to her on a bench!

:)