Why didnt you accept his invitation to chat?
You were seriously that scared?
Why does one assume things supernatural are evil?

A long time ago, I used to be really good at things like that, down to the clothes they were wearing! Im not joking!
I actually got my computer to test the ability I had!
I spent hours in chat rooms to see if I could get responses from people that I would "sense".
Some have gifts or talents, so to speak, and chat rooms are a great place to develop them without making your real friends thing your a nut.
Over the years, sadly, I dont get
vibes like that very often at all. I miss it.
It very well could have been someone playing a joke on you but then again, you should have, at least, found out what they had to say.