Swaggachu

Personally I loved it and see it as one of the most original things done in anime up to this point. It was done for a reason too that makes sense once you watch the anime. You should give the series a watch, it's really good.

It's a reference to the controversial series of episodes called Endless Eight from the anime The Melancholy of Haruhi Suzumiya. Lots of people hated it and it's also believed to have ended the anime due to negative reaction from it. It's eight episodes straight of the same episode just with small differences. People were mad that Kyoto Animation trolled everyone by making eight of the same episode and actually airing it on television where people had to wait weekly just to realize the same episode was on again eight times in a row.