Do you think Brian adlibbed with his "HEY YE YAH" sounds when showing off his ninja martial art skills the first time he had to do it ???.......every time I see him in action it makes me giggle.....two particular favourites of mine were when he did it to Ivy in the cafe....and when he did it to the "daughter of a Japanese Sniper" in the adult education centre.....[she was fantastic in the short role she played....her eyes at the end showed real fear...and when she bit her bottom lip she made the viewer feel real sympathy !!!]