But how strange the change from major to miner

 I don't think this has ever happened to me before.

The last two images in this pack of cards are "Major" (from Fawlty Towers) and "miner" (just a man with a lamp on his hat). And the real miracle is that I still remembered the other 24 images, despite spending the whole recall time thinking "major minor, that's funny", recalling Major Mynah from an old adventure of DC's superhero the Atom, wondering why I've never understood the difference between major and minor chords in the first place and thinking I should look it up, and all kinds of other mental wanderings.

The whole card-memorisation thing just works on autopilot for me these days.