Golden Egg Level 13

Golden Egg Level 13 is the thirteenth Golden Egg Level in Angry Birds Classic. It takes place in the sky, much like all levels in the eighth world, and features the pigs placed into a large sack held together by multiple stone blocks, a single wood block, and five balloons. The sack is hung over a row of TNT crates, and on the sides, are metal balls and more TNT crates also suspended by balloons.

How to Obtain
Go to Danger Above 8-15 and zoom out until you see the Golden Egg sitting on the ground under the slingshot platform that has two wooden square blocks next to it. Waste the first two Chucks and use the two Hals to get it.

Strategy
To beat the level, the player must simply send the sack containing the pigs into the row of TNT crates (or to the ground if the TNT crates are absent when the sack falls). which will kill the pigs in contact. To do this, the player must do one of two things: use Red to pop the five balloons holding together the sack, or destroy the wood block underneath the balloons. Either method will send the Pigs to their doom.

Alternately, the player can just wait for the pigs to die inside the sack. This can happen because as the sack rocks, the four King Pigs inside slowly take damage. While this method is much slower, taking a few minutes, it is easier and can be more rewarding than the faster method, as Corporal Pigs are likely to escape the empty sack and land on the row of TNT, netting around 80,000 points combined with the score the pigs give upon their defeat. The four Red birds in reserve will contribute 40,000 more points, for a grand total of 120,000 points.

Trivia

 * This is the only level in Angry Birds that can be completed without the use of a single Bird.
 * It is also the only level to contain multiple King Pigs, although it's possible that 3 are imposters, or 3 are cardboard cutouts.
 * In the Angry Birds Trilogy version of Angry Birds Classic the level is replaced with this Level.
 * Also in Angry Birds Trilogy this level is replaced with level 8 instead of its intended number.