Is it right to slap an STN?

Nurses, 

Why would an RN slap an STN? 

I really don't understand? This is an unethical behaviour! I mean the RN is not only a health professional but a mentor, a teacher, a guide and icon to whom the STN looks unto!

What would warrant such an unscrupulous behaviour?

Is it right to slap an STN? For whatever reason...?