Athough not a goose egg this shows a Greenwing Macaw egg that has both internally and externally pipped. The air cell appears to rapidly increase in size as the chick prepares to internally pip. However, this rapid increase in air cell size is also due to the chick changing position of its head as it manouvres into hatching position. Notice the large air cell size - this egg hatched and was raised sucessfully. Its the chick in our avatar
Candling can guide incubation right up to hatching

Candling can guide incubation right up to hatching

