My understanding of the hartmann maneuver is something a little different, but the same annoying negative-g tweak.
Basically, you set up for a turn, the guy behind you banks to follow and pulls lead. When he does so, your plane disappears below his nose briefly. At that moment, you apply some negative Gs (not too many if done right I imagine), roll the other way and pull out, breaking the other way. By the time he figures out what happened, you've spoiled the shot.