You may have to try a couple times to pull off this shot. Aim at the chain saw in the middle. Your goal is to break the “right” chain so that the chain saw swings to the left.
Power Activation Point
Activate the power before you hit the chain saw. Your goal is to kill one of the pig that’s hanging on the bomb. By killing one of the pig, the bomb loses it’s balance and explode.
First Shot Result
After the bomb explodes, the explosion destroys the tower to the fight. Your bird drops down either killing the black pig or trigger the bomb. While the chain saw swings to the left, killing the rest of the pigs. You will get your three star rating if you can kill all the pigs in one shot.