There was a small article in yesterday's The London Paper about Saw III and how since it's release in the UK, ambulances have been called to three different cinemas to treat a total of 5 people (4 women, 1 man) who've fainted during torture scenes in the film.
Obviously the paper brands the movie ridiculously scary, but, actually, a closer read reveals something else. The cinemas in which people have fainted are in Stevenage, Cambridge and Peterborough - leading me to conclude that there's nothing wrong with the film; East Anglians are just wimps.
Being of East Anglian descent myself, when I go see it I suppose I'd better wear a crash helmet in case I fall off my chair. I did after all faint at Watership Down aged 5.