Lol and then a sinking feeling pops in your mind and then you realize you're in the class next door. Excellent meme and it applies to almost everyone because most of us have had this happen :)
On Fridays, my school has a weird schedule and it goes in this order: 1 2 First Lunch 4 3 2nd Lunch 5 6 so I walked in my 5th period class expecting it to be the 5th hour but I was supposed to be in my 3rd period class