Over the past few days, I've been having a bit of fun randomly thumping the upright piano we've got lying around gathering dust. Since no-one really plays it much nowadays, it has a few dodgy keys (i.e. broken dampers (f'') + occasionally-unresponsive-hammer (c,)), and some notes are jarringly off-kilter (having not been tuned for years - i.e. a). That said, none of that really matters, since I'm just randomly thumping it in whatever way feels fun to do, and which makes interesting sounds.
Disclaimer 1: Untrained pianist fumblings abound ahead...
Disclaimer 2: No pianos were (intentionally) harmed in the process of recording these snippets ;)