If you haven't unlocked this trophy by Chapter VIII, this will be a prime place to earn it. At the beginning of the level, Max will be in a cemetery. After going down the hill, there will be a set of double stairs in front of you. At the top, a gangster will be shooting grenades from a gun. By taking cover behind a tall tombstone, you can repeatedly pop up, quick aim and shoot the grenades repeatedly until the trophy pops.