During standard one, i went to toilet during class and after that back to my class. My class is 1A but i accidentally enter 1B which is next to my class.

Enter through front door and saw the class is different and walk out through back door like a bawse. everyone was stunt and slient including the teacher. I remember after i left the class everyone in 1B started to laugh.

That feeling like want to bury myself from them.