The cool thing about being a part of a formative piece of entertainment is that sometimes, just across the film lot, something else just as amazing is happening right next to you. 

For example, for a period of time, while Jerry Mathers was busy starring as Theodore Cleaver in Leave It to Beaver, preparations were underway on that same lot for Alfred Hitchcock's Psycho. These two programs would gain renown in their own right, and luckily for Jerry Mathers, he had a hand in the success of both of them.

According to Mathers's memoir, And Jerry Mathers as the Beaver, Mathers would often visit the makeup lab on the Universal lot as often as his shooting schedule would allow him to. Mathers wrote, "I would go there between takes when they were filming other parts. If Tony was shooting with someone else or if I had an hour or two of free time after finishing school, I'd spend it at the makeup lab."

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The lab was just a short walk away from where Leave It to Beaver was shooting, and was filled with every silly thing a kid could dream up. Mathers, who had developed a friendship with the lab workers, was often allowed to have some good old-fashioned childhood fun. He wrote, "The makeup men were always nice to me. They would let me make scars and mustaches for myself and they would allow me to mix different things to make blood."

However, Mathers also had a hand in some of the more professional projects that took place in the makeup lab, specifically one with worker Bob Dawn.

Mathers wrote, "Dawn got a skull from a medical surplus house and let me help him with his project. A new skull is bright white because it's been bleached. We had to age the skull by putting yellow and brown lines on it, then rubbing them off."

Spoiler alert: If you remember the skull in Psycho, you know it's meant to depict Norman Bates' dead mother. This also meant that Mathers helped Dawn apply fake hair to the skull, making for a truly terrifying visual. He wrote, "Every day we'd comb all the hairs through. You had to place it piece by piece, dipping it into the glue and gluing it to the head. This went on for three or four weeks."

He continued, "Every chance I got I would run to the makeup lab and help Dawn glue the hair on the skull for Psycho. It's actually the one they used in the film."