Best sci-fi movie mistakes of 1973
Continuity mistake: Shortly before Sol's death, Thorn rushes into the suicide center and talks to him from the control room above. When Sol pleads Thorn to listen, there's interference on the intercom. Now watch the control panel: The earphone cable on the left side dangles back and forth each time the "speaking permitted" sign flashes on and off, blatantly revealing the cheap trick they used to make the display flashing - they simply toggled the "on" and "off" frames.
Plot hole: There's a huge, fatal flaw with the whole concept of having guns that cannot fire on human guests as it detects the body heat. Unfortunately it's a stone cold,100% certainty that with the amount of gunplay going on in Westworld, virtually every day someone is going to be killed by a ricochet. Ricocheting bullets can and do kill people, and any scientist capable of designing guns like the ones they use in Westworld must know that.