This is a relatively easy stage to achieve three star mastery. Just launch your bird to the right.
Power Activation Point
You can either target the metal bar where the first two pigs sit, or you can target the location shown in our picture as you are about the land.
First Shot Result
The lasers will kill the pigs on contact, and cuts the metal ball lose. The metal ball breaks the platform and the junk crusher kills the rest of the pigs. The mastery stars are then awarded.