My son did the same at 8 weeks - stopped breathing in my arms, having fallen asleep just after a feed (thank GOD - had he done it when we were asleep then he wouldn't be here now). He was completely unresponsive and went grey. I called the ambulance, and spoke to someone in Control as my husband put my son in the recovery position. Luckily we live in the 'boonies, so have a RRU in each small town - they were there in 4 minutes and the ambulance there in 10. After 20 minutes oxygen my son's oxygen saturation was only at 70%, so we were taken up to the hospital. My god, those ambulances are bl**dy bumpy in the back! He had all sorts of tests - I didn't get any sleep for 60 hours - and had a similar episode the day after. No reason at all was found. I agree with teh ASBO's for babies - am buying my little boy plenty of Hoodies to get him used to the role ;)