Gaffes

When Michelle uses the taser on her dad, she's holding it with her palms up, then palms down in the next shot.

Several times throughout the movie, the Marshall drops his gun and the characters never try to grab it and use it against him. The most prominent of these examples are when they manage to temporarily trap the Marshall in a metal claw, and instead of picking up his gun off the floor and shooting his drone, they decide to run, even though shooting the drone would solve the entire problem.

However, it is more than possible (and likely) that the weapon is linked somehow to its robot owner - there have been examples of weapons developed in the past ten years in real life that respond only to an authorised person's fingerprint, for example.

However, there's no evidence for this theory within the film. In addition the above states that examples of such weapons have been developed in the last 10 years (ie, since 2015). The film is set in the 1990s.

The final scene is set to a piano rendition of Oasis's "Wonderwall". The movie is set in 1994, and the song wasn't released until a year later.

However, the film is set in an alternative timeline (the things portrayed didn't really happen in the 1990s). In the alternative timeline the song was released earlier than in our timeline.

Although the days and night spent on the road without their personal items with them, Michelle still has somehow had the time and equipment to style her hair (curls and bangs) and wear makeup.