you realise you can throw the hat onto Bowser, and the whole part where you play as him. It reminded me so much of the 'shoot at the moon' thing from the end of Portal 2, where the game has given you enough confidence with the mechanics and then presents something, un-signposted, that makes you think "wait... can I?!". Just incredible game design, and then hitting you with a whole new kingdom and loads of end game content on top of everything! I love it so so much. Oh and the hot feminism ending as well
