ABNORMAL Air Sack

[Mzyla]

I have few Goose eggs in Incubator - they are 17-th day today.
Two looks Normal/good, but one has abnormal air Sack!
Please see pictures & advice me before I toss this egg out!

 

[FarmInProgress]

Looks like the air sac has a ruptured, is there any movement in the egg?

 

[Isaac 0]

Looks saddled to me, were these eggs shipped?