i didnt read the entire conversation, but i think this guy is from ur local place, and its a SO CALLED Ddos attach which is also known as REMOTE DISCONNECTION.
dos:- Denial of services
Basically used to shut down some website for sometime, needs a lotta bandwidth, atleast 5 computer pinging the same website continuously with some DOS tool at around 3 mbps speed
Helps you to disconnect any computer from the internet at your local place. So i think that guy must be living somewhere around ur place. OR he has got the good bandwidth with quite a good internet speed.