Golden Egg #16 is located in Level 1-15: This one requires three steps and is probably the most difficult to obtain. First, you have to break the patch of grass behind the slingshot. After you do a round block of wood will appear on the ground in front of the slingshot. Bust that piece wood and the Golden Egg will drop down and start swinging around. Now you have two chances to hit the Golden Egg. Good luck! (→ see image)
Note, this is a two part video. The first part shows how to find the Golden Egg and the second is a walkthrough on how to pass the actual Golden Egg level.
Bug alert! Seasons Golden Egg 16 Broken (click for more info)Bug fixed! In the v3.0.0 update (“haunted Hogs“), the Rube Goldberg machine has been repaired. The 20th-century inventor would be quite happy.