Those boys loading the conveyor are obviously farm kids and used to working around potentially dangerous machinery. It reminds me of when my cousins and I were about that age we would constantly get in a race with each other and our grandpa was always having to tell us to slow down especially when we were bucking hay bales onto the loft lift. 2 of us just had to toss from the wagon and position on the lift but the 4 up in the hay loft had to drag and stack