"Runaway" was the first purely electronic score for composer Jerry Goldsmith. In order to give the synthesizers ambiance, several speakers were set up in a theater, and the playback recorded.
Many of the promotional images for the film (most notably the posters) featured Tom Selleck holding the rocket gun used by the villain, Luther, in the film, even though Ramsey never uses it during the story.
When Ramsay watches Miss Rogers on the monitor as she is cornered by the sentry robot, she reacts to a Taser hit, but the arc isn't there. The optical effect is missing.
When the domestic robot is examined, and the officer states "We've got a non-standard chip here", he's pointing at a chip marked CD4011 with the Texas Instruments logo on it. This is one of the most basic and common of all digital chips, and not at all "sophisticated", as he also puts it.
Chief of Police: You screwed up good, Ramsay. We got two dead officers, do you understand me mister? Two. Dead. Cops! We got two wounded - one of them your own partner - and we got two dead guinea punks! And no one knows why or what the HELL its all about!