Trivia: In the FFVII game, Cait Sith rides on a giant white stuffed animal. The reason it didn't appear in the movie is because there was already a rendered wolf and Red XIII; the filmmakers absolutely hated rendering fur, and thus Cait Sith's ride was scrapped.
Trivia: Many Final Fantasy purists wonder where Chocobos are in the movie. They don't appear, but there is a Chocobo silhouette on a sign that reads "Chocobo House" at 0:56:04 (in the upper-left corner). (00:56:00)
Trivia: Though it is never mentioned in the movie, the city sitting next to Midgar, where all of Midgar's citizens now live is called "Edge", as confirmed by the sequel video game "Dirge of Cerberus."
Trivia: A few years after the movie's initial release, an extended cut of the film entitled "Advent Children Complete" was released. It featured updated visuals and twenty minutes of new scenes that helped flesh out the story and supporting characters. "Complete" was released exclusively on Blu-Ray to help promote the format, and was never given a DVD release like the original cut.
Answer: The bullet bounced off and thereby did not directly hit him. As Kadaj's gang were after their "mother", you can be sure Yazoo did not intend to kill Cloud yet, so he must have aimed for the goggles. It's impossible for the bullet to graze his forehead in that angle, even though Yazoo could have calculated that, too.