I was getting off an Air Baltic A220 (my first time in they type) and as we boarded the bus to the terminal this particular 321 did a missed approach into Hamburg. Obviously a flight test from nearby Finkenwerder. A Mexican VivaAerobus performed a similar manoeuvre later. It brightened up my rainy day seeing the Koru in an autumnal Northern Europe - and likely the only time you’ll see it there nowadays.