I was standing in the power stacks by the batter's eye for the last three innings of the game. The people chanting were on the other side. I actually couldn't tell what they were chanting as the park was pretty loud and they were getting drowned out by other noise. From what I could see, they were pointing and yelling at someone (or a group) in the section of the Sun Deck immediately next to the Power Stacks, not at anyone on the field. I didn't hear anyone yelling anything obscene but they were plenty obnoxious. Security did come down at one point but I didn't see anyone get booted.