I wonder if it made a sound?
Based on large trees that have fallen down on my property, very definitely.
That question you refer to is subjective and revolves around witnessing an event. The event proceeds - in all its dimensions - whether or not there is a anyone to witness it. Probably a good case for claiming objective events are, in fact, real. Which, in turn, brings up the famous Lincoln quote on the related subject of false claims being true simply because a lot of people say they are.