Yep, that's a tangerine in his hand. He thought it was a ball, then realized it was food and bit into the skin. He wasn't happy with the taste or the fact that his mean Mommy took it away from him.
This kid will eat any and everything. If you are eating it, he thinks he needs a bite. If a stranger is eating near him, he thinks he needs a bite. He wakes up every morning and I hear him asking for "nanas" over the baby monitor. Nana is his word for food... any food, he especially likes bananas.