My son just pointed out that many warehouses are reluctant to stack pallets on racks more than five high, 40K feet is out of the question.
Unrelated butt: I had an experience at a previous job where one of the logistics hubs fell way( and I am talking way) behind. Management went insane scrambling to get freight moved through the system. They were flying in (even semi) experienced lift truck drivers some just for a few hours to fill all of the shifts. They had the wrong size forks for their fork lifts and the drivers would accidentally push the pallets on the other side of the rack, off the top this was a huge warehouse and there would be a crash with pallets exploding on the floor almost every two minutes. I kept my eyes to the skies walking thru there.
There are several youtube videos of fork lift drivers causing domino effects with warehouses full of vodka