I was riding an old Red Line train, and I noticed that on one of the doorways, where it says “Watch your step,” someone had rubbed off the U and the R so it said “Watch yo step.” I really wanted to take a picture, but I didn’t have my camera with me. Luckily, the chance came a few days later when someone had done it to every doorway. I had my camera this time, and took a picture of one of them:

Every doorway? Who would do that?