Darth Vader Robs Long Island Bank
Apparently the destruction of the second Death Star has stretched the Galactic Empire's coffers so thin that Lord Vader himself is robbing banks. From the article: "Impotent Rebel Alliance security forces tell Newsday (paywall) that Vader marched into a Chase bank in Setauket around 11:30 a.m. today. Brandishing a completely unnecessary handgun — as he had the power to choke the oxygen out every teller's throat — the fallen Jedi demanded cash."
The main reason is that while this world contains some wonderful things in it, it also contains lots and lots of bad stuff. Being able to find humor in bad situations can make life more bearable despite some of its horrors. Laughing at a situation or event doesn't necessarily mean that we'd chose for it to come about, it's a way of trying to enjoy life despite living in an often painful world.