Other mistake: At or just after the point where Steve McQueen restrains the diner owner from running out the door - McQueen's wedding ring is visible on his left hand throughout one entire long-shot. (He was 27, despite playing a teenager, and had been married to Neile Adams for more than a year).Sionnach_Dhu
Steve Andrews: Dad, it isn't vandalism! Doctor Hallen is dead, and he was killed by some sort of a monster! Now, I know because I saw it, Dad.