Is he paranoid?

Hello!
One month ago I met a guy online. We clicked right away - our meetings were few hours long, same sense of humour, interests, he was respectful, consistent and caring, there was a chemistry. I never met a men like that before. He told me he might be OCD but he was never diagnosed. After the last date when we were going back (it was quite late) he told me to go to the other side of the street and he looked scared. Then he told me "I thought this man (who was passing by) had a bomb". There were only three of us in the street, it's a small city, there were never bomb attacks in my country (I'm from Europe). I got scared of him and didn't say much till the end of the date. Later I asked him through texts about it and he said that this guy had a package and he heard ticking (I didn't hear anything), then that he was joking (when I said it's a bizzare thing to say). Now I am worried that he is paranoid and may have some mental illness. What do you think?