WATCH: Philly Dunkin Donuts Freakout Leads To Injuries

ROXBOROUGH -- Don’t mess around when it comes to coffee.

Police are looking for a woman who allegedly thew a mug at her server at a south Philadelphia Dunkin Donuts on February 12.

The suspect arrived at the location on 1551 Washington Avenue at about 6:50 a.m. in a dark colored vehicle, possibly a Ford Taurus.

A calm settles before the storm: all seems to be fine, and in the surveillance footage, the suspect is even shown smiling briefly as she places her order.

But then suddenly, everything goes all wrong.

It starts out with some gesturing, and what appears to be loud conversation. Then she shoves her money across the counter in a messy pile. A few more words are exchanged, and then she suddenly picks up a ceramic mug from the counter and throws it at the employee behind the counter.

She then moves down the counter and begins sweeping items off of it and tossing them in the direction of the employee.

At one point, a Good Samaratian is seen reaching a hand into the video in an attempt to stay the damage.

The employee, a 31-year-old female, was taken to Pennsylvania Hospital and treated for her injuries, including a laceration on her wrist.

The suspect is described as a black female, about 5’4 tall, 20-years-old, and of a thin build.

If you have any information about this crime or this suspect, please contact the Philadelphia Police South Detective Division at 215-686-3013.

Image and video courtesy Philadelphia Police Department.