Is not quite as hard once you realize there is a safe spot directly under his right foot. If you stand there bullets and the laser will miss you. If you are about to get hit by a missile dont dodge it, just jump. You are invincible while in the air. The only time you need to move out from under him is when he tries to sit on you. In this case jump to the side to avoid any bullets. If he is hugging the right wall avoid him completely as there is no safe way to hit him if he uses the laser.