That's why I think it can't really be super uncommon, because we know battery eggs don't sit on their sides any longer than it takes to ride the conveyor to the racks. And I collect my own eggs every single day by 4pm, so they can't have sat more than 10 hours. It's a rare batch that I don't get one with a side cell. It irritates me because half the time I'm boiling it's for deviled eggs.