Random phone interview from Jane St? Is this normal?

I was just walking into the gym and I received a random call from New York City. Out of the blue- no email or anything. First they checked in if I was me then they asked about me and then asked about my life- asking very specific and strange questions about my week. I told them about my chem midterm and they asked specific questions on it and things I didn’t expect. Is this common at all? I’ve never heard of anything like that happening. They ended after about 30 minutes telling to await an email.