A transgender customer went off on an Albuquerque, New Mexico GameStop employee for referring to them as "sir." The video, which has gone viral, was posted to Facebook by a user named Tom Smith. 
The video starts with the customer cursing at the GameStop employee for offering them store credit instead of a cash refund. The customer can be heard saying, "I don't want credit, you're going to give me my f***ing money back." 
A woman that wasn't shown in the video could be heard saying, "Excuse me, sir, there's a young man in here — you need to watch your mouth," which set the customer off. From there, the customer went off, telling the GameStop employee, "Mother f***er! Take it outside! You wanna call me 'sir' again? I will show you a f***ing sir!"