The eyes that I used to show the anger in my avatar was the eyes of toothless from 'How to train your dragon'. It was a close up of his eye and he was very angry so I decided to use that eye for my avatar. His eye looked awsome since it was all different colours inside it. I duplicated the eye when I was placing it on my avatar I saw that the other eye wasn't looking on the same angle that my face was. So I just rotated it so it would look symetrical.
So here is the eye, I found it difficult to cut out due to there being no kind of indication where the eye finishes but I think I had a pretty good judgement.