In just 44 seconds, we were given a setting, a plot, a protagonist, and an antagonist! This short film is rich in its context. I believe that it resonated with many viewers, because it could happen to anyone. Who wouldn't want to give the strict adult a taste of fun? What about showing that sneaky brat a thing or two? It could've possibly given families a great talking piece, which is what is pictured in the poster: a laughing family.
As a previous commenter mentioned, it has something to do with having enough fun without someone getting truly hurt. Who hasn't gotten into a fun tussle with a sibling, only to have it end, because someone accidently scratched the other?
It's about living in the moment, and letting loose. Life needs balance; and karma can get you, too.