If you follow this npub, you might already know that you're looking at Jacob Cornelisz van Oostsanen's "The Laughing Fool".
https://blossom.primal.net/e62893fdd470b8b7fdfdd0710658f2eedf107c097d1680101...
To me it feels like forced laughter, that feeling when you have to choke out a laugh or it could be your head on the line.