That was all pre-sorting and very gentle compared to the part of the plant where I used to work: pre-load.
It comes down these conveyor belts and steel slides straight into the mouth of whatever truck you're loading at that time. I loaded 3 semi-trailers a shift with a wrist mounted scanner I used on each package to poll every box/package on that truck. You had to do it like a giant game of Tetris so each square inch was filled without the boxes on the bottom getting squashed and so that there would be no shifting as the truck drove across the state every night. It was like a machine, the way your head goes into this ZONE....
I have to say that was the best shape I've ever been in, and the best I was ever treated as an employee. Great pay & benefits.
ETA: I think the reason most eggs have issues is that the senders often send them on their sides! The air cell naturally wants to be, and *starts* at the fat part of the egg. If you have it on its side, every bump and jarring motion will push that air up (because air rises!) to the highest part of the egg, and separate the membrane from the side of the egg to get to the uppermost point of the egg on its side. This doesn't happen in the nest because the momma isn't a bumpy car ride.
Eggs shipped fat-side-up have less chance of membrane separation, assuming the shipping label is on the top of the box...
