a fancy way of saying that anything can happen. Since anything is possible, then anything is probable, even if that probability is astronomically small. Back to the waving statue. In the case of the marble statue, molecules in solid marble are continuously jostling against one another in random directions. The jostlings of the different molecules cancel one another out, so the whole hand of the statue stays still. But if, by sheer coincidence, all the molecules just happened to move in the same direction