This is a hands-on demonstration. Try this with your friends, and be prepared to explain the physics of the demonstration to them.
Work Step by Step
You will see more coins as the angle between the mirrors becomes smaller. When the mirrors are at right angles, and you wink your right eye, the image's right eye will wink. You can also see that text in a book is not flipped when it is viewed in this special configuration of mirrors. One way to explain this is that a single reflection flips the image left to right, so two reflections restores the status quo. For another explanation, do an internet search for "non-reversing mirror" and look for ray diagrams.