I saw this video by Game Soup, and immediately went into PTSD from a repressed childhood memory. I swear I spent two to three months of my life trying to figure out this specific puzzle from Super Mario RPG! I even remember I beat it and then didn't save and it was one of the most devastating experiences of my childhood. My childhood wasn't that bad.
Anyway if you've played the game and need a reminder, check out the video and relive it below.