There's an episode of Clarence called 'Clarence Wendle and the Eye of Coogan' where he and the other kids in his class go on an adventure to solve a conspiracy and find treasure, and at one point, they head to a room in their school that has '224' labeled onto the glass, and the scene of the room starts out looking at the door from the inside

I've seen this episode before, but i somehow didn't notice what this label looked like backwards, i wonder how they managed to sneak that in