I think it's a loop , and each of the eggs lerp to the egg that have it's ID as Egg.ID - 1 ...
<img src="https://dl.dropboxusercontent.com/u/89532891/Everything/Images/Final.png" border="0" />
Basically , it's a loop that runs every tick , the lastX/Y is first set to the Player's Position , and then , it lerps to lastX/Y and sets the position to this instance's position , to then re-lerp to it until it moves every egg ...
It probably won't work , but yeh , I don't have much time to debug it ...