Anyone who knows baking knows that part of making a delicious, mature, yeasty loaf of bread is that once the dough has doubled in size, it needs to be knocked back before it can be shaped and baked. It’s a process called ‘proving’ the dough, and that’s where we meet Ari at the beginning of Bloom. He’s moody and angsty in a way that is generally formless and cannot be contained.