This photo was my desktop for a long time. I am fairly certain I've actually seen video of this as well. The tank kept trying to get around him and he kept moving into its way before climbing on top of it and yelling at the crew.

The video cuts out when two people in plainclothes show up. Nobody really knows if they were concerned citizens or government agents, but either way, nobody has been able to track this guy own.

Hopefully because he's really good at hiding, but the truth is probably more depressing.