Indeed - I believe it was a highly successful build order that strayed from the 'norm' at the time. I was quite into SC2 at the time and this was something of a big deal.
It was the 7 roach rush. Used extractor trick which was generally considered a bad idea by humans due to being economically bad as well as a double overlord which is also against general build principles, but it turned out that it smoothed into an insanely efficient early attack.