Transcript:

A couple of days ago, I posted this photo. Notice how the infinity curves towards the left. Now, here's another photo taken in the same elevator. Watch this. Notice how, at this time, for the second photo, there is no curvature to infinity. It goes straight through in a straight line.

So, the reason the first photo—the infinity curves to the left, this one—is because the camera was not parallel to the mirrors. The camera was at an angle. And depending on whether the camera is at different angles, I can make the infinity curve to the right or to the left. I can make it do that. And if the camera is kept perfectly parallel, the infinity just goes straight through.

Now you know.