Also a clever film about equality
During my last viewing of the film, I realised that it's also a clever commentary on inequality.
At the beginning, K instructs the border patrol to "protect us from these illegal aliens", as if they were dangerous.
There's also an element of gender inequality, because when Laurel gets kidnapped by Edgar in front of J after acting like she wanted him, she says: "That is so typical... Any time a woman snows slight sexual independence..."
And it becomes strangely obvious at the end, when J starts squashing the cockroaches to get the large bug's attention and shouts something like: "Oh was that your auntie? They all look same to me." For the bug, they are all separate beings, yet J doesn't recognize that.
It's a really interesting subtext that doesn't get discussed a lot. The "flashy thing" may even be a metaphor for our need to forget the Holocaust and other similar events in history.