#1: Jurassic Park: Dino Attack
In a movie full of scary dinosaur attacks, the one that always scared me the most is when the dilophosaurus gets Dennis Nedry. But, of course, Nedry is the reason that all of these security systems have failed, and the dinosaurs are getting out and wreaking havoc. So, I guess he deserves what he gets.
But have you ever thought about the way the dinosaur behaves in that scene? It seems to go from cute and playful to fatally aggressive very quickly. Here, one viewer offers their theory as to why. I think this seems totally plausible!