T-Rex: There's the story that when film was first invented, people in the theatre were so scared of a shot of a train moving towards the camera that they screamed and ran from the room!

T-Rex: BALONEY, I say. Baloney!

T-Rex: Like we all love to think that people in the past were rubes - it's hilarious and what can they do about it? NOTHING, the buncha rubes!! - but if you think about it for a second, is a flickery silent low-framerate grainy black and white 2D train really going to inspire terror? REALLY??

Utahraptor: Not likely!
T-Rex: Exactly!

Utahraptor: Unless of course the previous best tech to produce a moving image on wall was a camera obscura - a pinhole in a dark room that results in an image on the opposing wall - in which case they might conclude that IS what's happening, and fear the approaching train.

T-Rex: Aha, but a camera obscura projects UPSIDE-DOWN, so these people still wouldn't be afraid. Unless they were all rubes. Which, as we've previously established:
T-Rex: MAYBE??