https://www.vice.com/en_us/article/n7w5pq/mentally-we-are-anywhere-but-here

I'm looking at a video of a dog, a yellow lab, gently floating in the ocean. Its legs paddle softly, a forlorn expression on its face. The yellow lab rises and falls with the gentle wave until a person, presumably its own, descends from a ladder and reaches their arms out to the dog, whose plaintive face makes an expression like relief. I let the video loop over, and over again. Even now I see it in my mind's eye. Mentally, I am there.

Twitter's bread and butter is this kind of "relatable content," and this format for memes has seen many different iterations. On any of these tweets, you could replace "mentally I am here" with "big mood" or "aesthetic" or "it me" or "me IRL." This is a new coat of paint on a very long genre of tweet that uses a video, still image, or gif to express one's feelings. What is key to this meme, and the current moment, is where people want to be mentally is as far away as where they are physically as they can possibly be.