1. He had lots of phobias (including eggs and jail cells!)
Hitchcock had a lot of fears. The most unusual of these phobias was probably his fear of breakfast foods. More specifically: chicken eggs. The oozy yellow yolks, specifically, freaked him out. He once said,
2. He was one of the first to make cameo appearances
Sir Hitchcock has 52 major films that have survived (one of his silent films from 1927 has been lost) and he makes cameo appearances in 37 of them.
3. He popularized the MacGuffin
it’s something used in a plot that helps to advance the story, but doesn’t really matter for any other reason than to advance the story. For instance, Harrison Ford once told David Letterman that all of the objects in the Indiana Jones movies are basically MacGuffins.
4. He tried to hide Cary Grant in Lincoln’s Nose
In North by Northwest, the climactic scene happens on Mount Rushmore. He wanted Cary Grant to hide out in Lincoln’s nose, but have his pursuants discover him when he sneezes.
clipped from: www.mentalfloss.com 
