I call that last part desperation...if you are betrayed by the one you love...you feel anger...A good teacher would also have learned to control Anakin's emotions like Qui-Gon tried to do in the cut scene from ep I...the fight with Greedo. Apparantly Qui-Gon cared a lot more about Anakin's emotions and he didn't take it for granted like Obi-Wan and the rest did