Fernanez always cocks his head at a 45 degree angle just before attempting a breakaway gimme layup/dunk.
What's your point, my favorite, little, Laker-obsessed, Kobe-lover? That picture shows two things very clearly:
1. Ariza was playing the ball.
2. In an effort to play the ball Ariza's forearm clipped the top of Fernandez's head.
It happens, it's common, it wasn't a dirty play in the least and that picture is a great angle that proves that point.