Context: I had a panic attack the other night and it was terrible. The worst part is that I have no reason to be so stressed 
Speaker 1: The other night I had a panic attack out the blue 
Speaker 2: That must have been scary.  Is that the first time it has happened to you?
Speaker 1: Sadly no, I get them maybe once a year. The worst part was that I had nothing to be stressed about. 
Speaker 2: Are you able to do anything to prevent them?