General Grievous: "Anakin Skywalker. I expected someone with your reputation to be a little... older." Anakin Skywalker: "General Grievous... you're shorter than I expected." General Grievous: "Jedi scum!" Obi-Wan Kenobi: "We have a job to do, Anakin. Try not to upset him."
In the beginning of the film, Anakin and Obi-Wan meet General Grievous. A humorous exchange ensues right before another battle begins. Jedi scum!