When Bill is about to shoot Ralph he is not wearing sunglasses. After the camera angle changes, Bill is wearing his sunglasses.
In the long shots, the runaway cars are shown coming down the right side track of two tracks. When Ralph collides with the cars, they are on a single track and when the cars stop and the train goes by the train is on the right side track and the stopped cars are on the left side track.
When Ralph puts the suit in the outdoor trash can, he puts it on top of leaves/sticks. The following morning when the trash collector empties the can into the truck, there's a close up of the trash going into the truck and there are no leaves/sticks in it.
Ralph loses his memories back to the night he saw the flying saucer, but he never once asks about looks for his son Kevin, who was in his custody at a time.
To correct previous Factual errors
"A trash collector would not walk up to someone's house to retrieve a trash can to empty it. He would only empty it if it is on the curb.". This is not true, in some neighborhoods, trash can be collected in back of house.
A trash collector would not walk up to someone's house to retrieve a trash can to empty it. He would only empty it if it is on the curb.
When Ralph crashes through the van's windshield, it is made of thin plastic, not windshield safety glass which is much thicker and does not break cleanly as was depicted.