More of the phantom stair

Since we discovered the stairway to nowhere, we realized that the only thing holding up the floor covering the stair is one single 2x4. This seemed a little unsafe, even though it has probably been like that for decades, so we ripped up the floor covering the stair. Now, everyone will see that it's a potential hazard and hopefully won't fall through the floor. Here is a picture from the top of the stair.