I recieved a rather strange phone call!

A while ago I recieved a rather strange phonecall. Never seen the number before. I don't screen phonecalls. In the other end there was this woman saying angrily: REIS! (which means GO! in Norwegian)

I didn't get what she was saying at first, so I said: Hello?

Everytime I said that I just got the same word back (I think). So eventually I hung up. Was too creeped out.

It wasn't a prank call, the woman sounded rather old and she didn't hide her phone number. I haven't tried calling her back up, seems to have lost the number too. Looked up the location of the holder, but can't remember that either.