Continuity mistake: When ET gets beer from the fridge, he tosses food at the dog. The dog is always close to the fridge, by the oven, except for the shots where he is tossed the potato salad, where he is several meters behind, on a rug by the cupboards. This change of position swaps back and forth.
Continuity mistake: When the final bike chase starts, the kid with the blue ski mask who cries "We made it!" changes positions 3 times in less than 2 seconds: 1) To the left of a kid with a red hat, both behind the one with a cap. 2) To the right of the one with a cap, riding parallel to him. 3) Behind everyone, completely alone.