I was talking to him about this event. He could not really tell me what caused this. He said only that “our date was great, and he knew he will spoil it somehow”. He admitted it was irrational but he did not realise that his behaviour was odd until I told him about it. On the street there were two of us and the guy (I did not look at him so I don’t know if he even was carrying a package). He did not act paranoid before and he said that’s first time when something like that happened to him but it may be that he is just not aware of these kind situations.