I look at myself in the spoon I use for breakfast. Every morning, both sides. My face is normal and then upside down.
If you hold the spoon by the handle, gently, I’ve come up with this trick to make it spin non-stop: pushing it with your thumb and pulling it back with your middle finger. Let it just slide on the index. Upside down and right side up, and the face never stops changing…
Sometimes I look at my face upside down and I bend the spoon back and forward so that my forehead gets twice as big and my hairline is pulled back, or my nostrils turn into huge holes right in the middle of a face with no mouth.
I can use the lenses of sunglasses too if I’m facing the sun, but spoons are best.