Student Failed the Exam

https://goo.gl/images/6d2ouA
There is a student who always fail in his subject in school. So his father was so disappointed with him big time.
This how the conversation goes;
Father (Deigo) and Son (Peter)

Peter: Dad, i am sorry this is only what i've got. (74% grade)
Deigo: the next time you fail again do not call me your dad anymore! ( fraustrated).
After the exam.
Deigo: Hey Son, how's the exam?
Peter: Sorry, I got failed again Deigo.
Hahahaha.