I've only ever seen pictures of him standing up to the tanks. Did they stop? Or did they run him down in front of thousands of people?
There is a lot of conjecture about Tank Man's identity and fate but there is very little hard data about this individual before or after the Tiananmen crackdown. Soon after the famous photo, two individuals pulled him into a crowd (you can see this at the end of this video of the incident) and he has since disappeared. PBS's Frontline did an episode about the event and its aftermath, including interviews with witnesses and specialists on China, and it is well worth checking out.
The introduction to the book Tank goes into considerable detail about this in the first chapter.