Putting boxes in trucks take a bit of skill if you don’t want it falling on top of you. You have to build with natural Ts to keep the boxes stable or else those columns you just built can easily topple. Keep in mind that those boxes come down the conveyor in all shapes and sizes and the speed they come can be unrelenting.
Source: I was a UPS loader when i was younger.
On that note, fuck Daylights Savings.