The Peanut Butter Solution

Michael lost his hair because of The Fright, a supernatural illness triggered by his terrifying encounter with the ghosts of the homeless residents who died in the mansion fire. The experience was so psychologically traumatic that it manifested physically as complete hair loss, which he discovers the next morning.

The ghosts' haunting appearance in the mansion directly precedes The Fright's onset, establishing the supernatural cause-and-effect.

The Fright is a supernatural affliction that strikes anyone who encounters the ghosts of the burned mansion. It manifests as complete hair loss and creates a psychological state of fear and anxiety. The condition is transferable through the ghosts' magical realm, eventually passing from Michael to the Signor when he's lured to the mansion.

The ghosts warn Michael about The Fright from the beginning, hinting at its transferable nature.

The ghosts appeared to Michael in his dreams and provided him with a magical hair-growth formula whose main ingredient is peanut butter. They gave him precise instructions on how to create the topical solution, though they warned him not to overuse the peanut butter. The ghosts were homeless residents who died in the mansion fire and seemed motivated by guilt, especially after Michael gave money to homeless people.

The ghosts' guilt over Michael's kindness motivates their decision to help him after his initial failed attempt.

The ghosts warned Michael that using too much peanut butter would cause dreadful things to happen. This warning proved accurate when Michael ignored it and woke up with hair growing at an uncontrollable, massive rate, filling his entire scalp within minutes. The overdose of the magical formula created a hyper-growth reaction that became a serious problem rather than a simple cure.

The ghosts' explicit warning about overdoing the peanut butter directly foreshadows the chaotic side effects Michael experiences.

Connie tried to replicate Michael's hair growth by applying some of the formula to himself, thinking it would help him "simulate puberty" as a joke. However, the formula worked exactly as it did for Michael, it caused uncontrolled hair growth on Connie's body as well. The prank backfired hilariously, exposing both boys' involvement and leading to their suspension from school.

The formula's magical properties don't distinguish between users; it simply works according to its own supernatural logic.

The Signor, a former art teacher who forbids imagination and creativity, was fired from the school for his extreme views. After discovering Michael's magical hair, he kidnapped Michael and several neighborhood children to force them to work in his factory. He used Michael's hair to create magical paint brushes that can paint whatever the user imagines without requiring skill, using the children as forced labor to produce these powerful art tools.

The Signor's rigid opposition to imagination earlier in the film explains his obsession with harnessing magical creative power for himself.

Connie devised a plan to trap the Signor by tricking him into painting a picture of the abandoned mansion, then daring him to investigate inside. When the Signor entered the mansion, the supernatural realm of the ghosts responded to his presence. The Fright, which had been attached to Michael since his initial encounter, transferred to the Signor, leaving Michael bald and causing the Signor to experience the same terrifying affliction.

The ghosts' realm responds to those who enter the mansion with fear, just as it did with Michael initially.

After The Fright transferred to the Signor, he became bald and frantic, pursuing the children in a panicked state. As the authorities closed in on his factory operation, the Signor tried to escape but was ultimately arrested. His magical paintbrush factory was shut down, and the children were freed from his captivity.

The Signor's greedy exploitation of the children's magical labor leads directly to his downfall.

Michael's hair stopped growing because The Fright transferred from him to the Signor. Once the supernatural affliction passed to the Signor, the magical hair growth phenomenon ended for Michael. With the resolution of the supernatural element and the return of his mother to reunite the family, the story's tension dissipated and Michael's life returned to normal, including the cessation of his uncontrolled hair growth.

The transfer of The Fright to the Signor mirrors the initial transfer from the ghosts to Michael, completing the supernatural cycle.

The ghosts returned to give Michael a second chance after he attempted to use the formula but his family mistakenly discarded it. The ghosts felt partially responsible because they had accidentally misled Michael about the purpose of the formula initially, thinking he might ingest it rather than apply it topically. Additionally, Michael's kindness in giving money to homeless people earlier earned him goodwill from the ghost residents, motivating them to help him fix what went wrong.

Michael's charitable act toward homeless people establishes his character and directly influences the ghosts' decision to assist him.

Michael and Connie were suspended because their hair grew to ridiculous, uncontrollable lengths that disrupted the school environment. Michael's hair was growing at a magical rate, and Connie had also applied the formula, resulting in both boys having absurdly long hair that became a distraction and nuisance for classmates and teachers. The suspensions reflected the chaotic state their lives had become due to the hair growth situation.

The escalating hair growth problem directly stems from Michael ignoring the ghosts' warning about overusing the peanut butter.

The magical paint brushes the Signor forced the children to create used Michael's supernatural hair as their core. These brushes possessed the remarkable power to paint whatever the user imagined without requiring any artistic skill or fine detail. The user simply thought of something, and the brush would bring that image to life on the canvas. The Signor exploited this power by forcing the children to produce imagined creations for his profit.

The Signor's obsession with suppressing imagination earlier makes his exploitation of magical creative power ironic and thematically relevant.