Be prepared to be a little bit freaked out. 

The Simpsons has been in our lives for a quarter of a century at this stage, and one of the most beloved traditions of the show is the customary couch gag at the start of every episode. 

There have been hundreds of them at this stage, and while we're not sure that this video (which features 554 of them) has every single one in existence, we can safely say that it's a fair wedge of them anyway. In the short clip, they all play at the same time, with the longer ones lasting up to a full minute. You might want to turn your headphones down a bit though, as you'll be hit by the crescendo of the theme tune about 500 times too. 

Our day just got a whole lot weirder.

Via Mashable. Main pic via