On the wonderful website efukt - I was introduced to it via the NSFW forum but I've not been on it in a while - they featured one of those 'nullo' people once. They were complaining about the police being on at them because when they'd carried out the action they hadn't done it right, so they hadn't cut off the blood flow properly, so when the actual severance happened there was a lot more blood than there should have been and they panicked and phoned an ambulance.
I wonder what that paramedic visit was like.