I just received the BEST EVER Indian tech support call!

Just had the BEST EVER phone call from an Indian Tech Support person:
Phone: Ring Ring
Me: Hello, Nigel speaking.
Lady: Hello, I am calling from Windows Operating System. We are calling to let you know that your computer is at risk from Viruses!
Me: Really?!?
Lady: Yes! But it's not to do with your Antivirus. It's to do with Windows Internal Firewall.
Me: Oh Gosh! Really?!?
Lady: Yes. We need you to visit our website to download repair tools to fix the problem.
Me: Sorry, you must have the wrong number.
Lady: No, no, our systems are telling us it's your computers.
Me: That's funny, because I don't run Windows.
Lady: (pause) You don't run windows?
Me: No.
Lady: But you have computers?
Me: Yes, but they run FreeBSD and SnowLeopard in VirtualBox VM's
Lady: Huh?
Me: No Windows here...
Lady: Well go to Hell! (Click)