The scene where Brennan throws her keys was unscripted.
When Aubrey, Booth, and Bones meet at The Founding Fathers restaurant, Aubrey is eating a huge meal consisting of a hamburger, onion rings, a sandwich, a salad, and side dishes. He tells Booth that he's starving after going through all the case files. When Bones arrives and sees his meal, she asks him if he hadn't eaten yet that day. This is the beginning of the running joke of Aubrey's obsession with food. He always has snacks with him, and in many of his scenes, he is either eating or talking about eating/being hungry.
At the time this episode was filmed, Rance Howard was 85 years of age, the same as his character, Jerold Norsky. By the time the episode aired, Howard was 86.