If you are not shocked by quantum mechanics, you have not understood its implications. I still remember my first shocking encounter with Heisenberg’s principle in my freshman chemistry class. I was in disbelief for weeks, as I clearly grasped that quantum gives a huge blow to our cozy concept of existence. One is forced to really think about the meaning of existence when the small particles that make our world do not quite enjoy a reasonable reality, but appear to exist only if forced to materialize by observation and then disappear in a cloud of probability. Those who think quantum pertains only to the very small have not quite grasped its full consequences.
Paul Davies