A.I.: Artificial Intelligence/Fridge

Fridge Horror: The "Trenton incident", mentioned in the movie, was revealed in the novelization. A homeless, drunk man was scanned with malfunctioning equipment and ripped apart on stage at the Flesh Fair, them thinking he was a mecha.
Fridge Brilliance: Roger Ebert, initially a critic of the ending, warmed up to it upon repeat viewings. From his "Great Movies" essay:

Watching the film again, I asked myself why I wrote that the final scenes are "problematical," go over the top, and raise questions they aren't prepared to answer. This time they worked for me, and had a greater impact. I began with the assumption that the skeletal silver figures are indeed androids, of a much advanced generation from David's. They too must be programmed to know, love, and serve Man. Let's assume such instructions would be embedded in their programming DNA. They now find themselves in a position analogous to David in his search for his Mommy. They are missing an element crucial to their function.
...
Here is how I now read the film: These new generation mechas are advanced enough to perceive that they cannot function with humans in the absence of humans. David is their only link to the human past. Whatever can be known about them, he is an invaluable source. In watching his 24 hours with Mommy, they observe him functioning at the top of his ability.
Now, perhaps, they can construct a mecha that they can love. They would play Mommy to their own Davids. And that mecha will love them. What does love mean in this context? No more, no less, than check, or mate, or π. That is the fate of Artificial Intelligence. A thinking machine cannot be understand except by something that is not a machine, and can think. David wants to be a real little boy. They want to be real mechas. No Mommy will ever, ever love them.