Idk If I'm just dumb but why was everyone Injured because of the white dress?
A literal 1:1 analogue(there are better examples, this is the best I found on short notice):
Simply though it was a combination of a very famous person wearing a completely different look from normal(unexpected), and looking really cute that people were distracted by staring and had accidents.(it's meant to be humor for just how much of a difference the change in look was, by overexagerrating the amount of injuries caused)
You also could take this video and replace cell phones with people staring at her as she walked by.
I really am sad though. I swear there was at least 1 movie, or cartoon, or manga, or anime that had a scene that was this exact scenario, but I just cannot remember it.