In Micmacs, Bazil is the protagonist of the story, initially a Tarantino-like video store clerk, and later the mastermind of a revenge plot. One of the reasons for his quest for revenge is the fact that he was shot in the head by a bullet. The bullet was not removed and was instead left in his brain.
What were the effects of the bullet? Besides ruining his earlier life and leading to his revenge quest, how did it affect him psychologically or physically?