As the cars stall on the freeway the electrical disruption moves slowly, the cars stop like dominoes jumping a few feet per second.
In the view of earth from space the electrical disruption moves quickly, covering hundreds of miles per second.
Dial-up modems would be utterly useless during a worldwide blackout. Even if you could get both computers powered up and running the network infrastructure necessary to dial out is still non-functional.
In a common error made on TV shows, people shot by crossbow bolts (or bullets for that matter) are not propelled backward several feet.
Powerless aircraft plunge from the sky but their lights are still on.
15 years after everything turns off, several city skylines are shown. The image for the St. Louis skyline, looking from Illinois, is reversed.