Last 3 matches of TI3?
He was mostly just saying stuff like "yeah, they're going to gank now" and then they'd gank. He predicted every item build EVEN BEFORE THEY HAD ANY COMPONENTS (which was ****ing cool). He gave very good insight into what was going through the minds of the players at any given moment.
The best part was in the last game. Na'vi went to push the mid tower, and he just said, "Alliance had this planned, now they're going to push into the base slowly with PL." We know what happened next. Burning isn't my favorite for nothing.