So the other day, on a light hearted tone I said that I felt that I had known people on the team in years, when in fact I've only joined recently. Most people I've met are friendly and supportive, and quite chatty. I feel like I fit right in. But then this one colleague said, if you're still standing you don't know me. As I was about to leave the building, and before I could reply another colleague said have a nice long weekend, so I just overlooked her comment. But I found that comment quite unsettling and, quite frankly threatening. I don't if I'm overreacting or if I should keep my distances with this colleague. Any thoughts?