I <i>almost swear</i> I heard and distinctly remember this event.<p>I live in Atlanta, and that very spring I recall hearing a single thunderclap that echoed as if from another dimension. It was loud, ethereal, bellowing, deeply reverberated like nothing I've ever heard before.<p>I then saw several /r/atlanta posts that pointed out the same phenomena. (I'll try to dig these up in Google and link them.)<p>When I mentioned it to my coworkers -- it was that remarkable -- they thought I was crazy. My proposed hypothesis at the time was that lack of pollution in the air due to pandemic shutdowns had changed the particulate matter in the atmosphere, changing reverberation physics. But that was stupid, and my coworkers just nodded it off.<p>If I can corroborate the timeline, this is pretty neat.