Factual error: Trevor was driving ECTO-1 at over 60 mph. Podcast was driving the remote car and it was pulling away from ECTO-1. There is no way that the remote car could be going faster than ECTO-1, unless it was souped up, which it didn't appear to be when looking at it.
Suggested correction: There are plenty of RC cars on the market right now that anyone could buy that are capable of going 60+ MPH (the fastest can hit about 100 MPH). And if you take them apart, they don't look "souped up" at all. They just look like regular RC cars inside. Components don't have to look fancy to function fancily. You also have to account for the fact that the movie is highly fantastical, so there's no telling what kind of technology the RC car uses... for all we know, it could be nuclear-powered like the proton packs.
Factual error: When Chul-min is shot by Sergeant Hwang, it takes only a couple of seconds for him to die. The bullet hit Chul-min on the left-hand side of his upper chest and was only shot once. No human being on the planet can die from a single bullet wound to the chest that quickly. It would have taken a couple of minutes, maybe even longer, for him to die from that. (01:20:35)