Photo Realism practice

Some guy on here said to me that it was impossible to learn photo realism within a week (and actually be great at it) <--- well, at least that's what I thought he meant. So we made a bet. Long story short... I need to become a master at Photo Realism by next Wednesday. So I am in DESPERATE need for critique. And I need it quickly. I really want to hear what you guys think. I felt confident enough to post this picture. But I'm not where I wanna be yet. I wanna really want this to be absolutely perfect. Just to see the look on his face.. Well, imagine the look on his face.