While it's probably unwarranted, I had the fortune to travel with my two largest useable bags last night. They weren't heavy, I just needed two bags and all my reasonably-sized ones were busy. So when an old (very mobile) guy and younger (teenage) kid both moved directly in front of me, picked up their one large bag each, and proceeded to stand around staring at the belt... it was a bit much. So maybe I gave the two large bags a bit more swing at head level than was necessary.

At no point were either of them in danger of actually being hit in the head with these deceptively light bags (the heaviest was 12kg), but it was immaturely satisfying to see them try to dodge a bag that poses no threat.