Oh, Leon was no amateur. He knew better than to shoot in a room full of people, but when other people's lives were at stake, there wasn't much you could do besides stand there starring at the scene, or actually react toward the threat. He trusted his aim enough though, don't you worry.
Suddenly he felt like all the other still people in the room when the other man with a gun started giving orders. "I've got it taken care of, than--" He would have pushed the crowd away from the scene if he wasn't thrown off by Camille's sudden impact. He quickly threw his arm back from Camille and glared coldly at the man with the gun on the other side of the room. It was his job to protect, god dammit. This guy looked like he had just finished a street fight.