Down at about a thousand units erm  you er b between ten thousand and a thousand units  er you'd suffer the symptoms of radiation sickness  erm your hair would drop out and your teeth would drop out and you'd vomit and  your skin would turn a funny shade of green and  and you'd be very ill erm but you, you'd probably recover  er you might not but you, you, I mean people have actually had those sort of doses of radiation  and have actually recovered er from it.