25Blurry Vision - Spider-Man 1
Let's start from the beginning with Sam Raimi's Spider-Man from 2002. The original turned Spidey's origin into a tale known worldwide, but not without some odd mistakes.
After the spider bites Peter, he returns home for a fever-induced nap. When he wakes up, he notices that his body has drastically changed. He picks
up his glasses, only to discover that the lenses make his vision blurry, not clear. The spider-powers have repaired his eyesight. Look closely, though: the shot of Peter putting the glasses on doesn't just blur what's in his lenses — it blurs the entire screen. This reveals that all they did to create the shot was change the focus of the camera.