> Put your phone’s camera just above the surface of one end of the table and then slowly move the coin away from the camera. You will see the coin disappear bottom up. No it won't. And I suggest you take your own advice and actually try that for yourself, instead of continuing to spread this nonsense. Ideally with something more adequate than the thinnest coin you can find, which would conceal the difference between distortion and obstruction. Try some dice, for example. You will clearly see their bottom halves to not just disappear for no reason as you slide them away.