I think just mainly his head was moving. I recently saw a computer generated recreation of when the bullets were fired and how Trump moved his head at the same time. I wish I knew where I saw that because it wasn't on YouTube I've already checked My history. The illustration I saw if correct, shows he turned his head at the moment of the first shot and tilted it just a hair allowing the bullet to go through his ear. The same simulation showed that if Trump had not turned his head and tilted it at that exact moment, it would have went somewhere near the temple area or above his right eye in the forehead. So in reality the shooter wasn't a totally bad shot, I think it was just a combination of things like Charlie mentioned where the cop right before the shooting probably made the shooter rush his first shot not knowing when the police were going to be climbing up after him. But one would think that the shooter should have known he at least had time to carefully aim the first shot and then maybe have to rush the rest of the shots. If the local police were supposed to be on top of that building and truly left because it was too hot, then that hot roof might have played a role too in him missing