I just went up to Jeff and yanked his hair out of his scalp.
How would you know that? How could you do this?
I was just really angry and emotional at the time.
It is wrong to violently attack someone. You should apologize and try to make things right with Jeff.
I forgot. My apologies.
You should do your best to not hurt other people if you can help it. Even though you were upset, try to next time let the person know how you are feeling instead of just being angry. Hurting the person is only going to make you feel good short term.