The man was upset over missing sour cream: Disgruntled Taco Bell customer shoots up drive-thru window, employee's car - Story Fucking A. Gee, the employee made a human error, who doesn't? It's weird because I tend to buy healthy (chicken) fast food sometimes, and I rarely get a messed up order. Oh damn, they forgot the hot sauce! I just use some Tapatio from the fridge, simple. Nut bag should be locked up.
And then there were the two women who pulled a pregnant teenager through the drive through and beat her up because she had the audacity to forget straws.
Realizing you didn't get a straw after you drive away from the drive-thru is annoying. It isn't really "beat the hell out of a random teenager" annoying but I guess different people handle the issue differently.