I agree with Fengzi. I get them every once in a while. Its usually always after smoking and I am 46. Since I am female I do get them at certain times of the month. I think female harmones like PMS'ing esculates it. IMO anyway. Been exsperiencing this for like 26 yrs and havent died yet...lol other then being worried about smoking illegally like here in the states there is nothing else to worry about. Smoking is to chill and thats what most smoke it for. Some people quit when it does that to them cause they just dont want to deal with the panic attacks. It can be scary.