You shouldn't make fun of someone's face.
James is having lunch in the break room at work when he notices a new employee with a cleft lip walking in.
James wants to introduce himself to the new employee.
James walks over to greet the new employee and starts up a conversation without acknowledging his facial features.
James walks over to greet the new employee, then begins mocking his cleft lip.
James and the new employee hit it off and look forward to working together.
Fearing that James' action would be indicative of the work environment, the new employee ends up quitting on his first day.