The problem with Vader is that he is hopelessly addicted to caffeine, and he hasn't had any for a while. Caf keeps him calm and he can start to feel the frazzled edges of his psyche.

The fact that the jerk ahead of him is just reading isn't helping. Doesn't he know some people have other things to do? RUDE.

"Hey, if you're just going to read, maybe you should let someone else move up in line."