Wow, very impressive. Did you have few very successfull post or you cumulated such karma over long period of time?
https://news.ycombinator.com/submitted?id=ColinWright
https://news.ycombinator.com/threads?id=ColinWright
That's the case with everyone. Click on their name to see their profile, etc. I can see you account was created 103 days ago and you have 151 karma. You've posted 8 links, and commented about 15 times (I didn't count precisely)