Splash Zone
Working at McDonalds my sophomore year of high school, some lady went through the drive through at about 1 AM. Someone accidentally gave her a large diet coke instead of a large coke or something, so she threw the drink back through the window.
The drink landed quite heavily in the fry oil and splashed all over one of our co-workers. The girl drove away pretty fast, but the manager got her license plate number off the cameras. She was sued pretty badly. Story credit: Reddit / Rebelpride1