The incident happened at the downtown location of Tim Horton's in Langley, British Columbia, southeast of Vancouver.
After the video went viral, people wanted to know what made the woman so furious that she did what she did. She then pulls down her trousers, proceeds to defecate on the floor, and then picks it up and flings it at the employee.
She also threw dirty napkins she used to wipe at the cashier.
According to Cpl. Holly Largy, the woman "was briefly detained and released on documentation to appear in court at a later date".
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The woman was mad because the Tim Hortons employee wouldn't allow her to use the bathroom.
Tim Hortons has yet to mention if this incident is making them reconsider their own bathroom policy, but the staff at this particular store is probably wishing they'd given that customer the restroom key after all.
A spokesperson for Tim Hortons told Canada's Global News they are "deeply concerned" by the video as the safety of their employees and guests is "always a top priority".
Warning: This video has graphic content and language in the title.
At one point, the woman grabbed a couple of tissues from the counter and continued to argue with the employee at the desk.
A spokesperson of the Canadian restaurant chain told that BuzzFeed News that some of its restaurants have a "restricted access policy for restrooms to ensure the well-being of our guest".
The BC Prosecution Service will review the circumstances and determine if charges will be laid.