What is believed to be the most comprehensive list of 'Helenisms' can be
found here. My favourites would have to be the following:
Dean (when asked what scared him most): "Insanity"
Helen: "Insanity? What does insanity mean? I'll never remember that"
Stuart: "What's Deans greatest fear?"
Bubble: "Going insane"
Helen: "No it isn't, its insanity he's scared of"