Home Alone’s ‘Wet Bandits’ are medical miracles
THE festive movie season is upon us, and one of my perennial favorites is Home Alone 2: Lost in New York. I will die on this hill: it is better than the original. But rewatching it as an adult raises an awkward question. How on earth did the Wet Bandits survive the first film at all, let alone escape without lasting injuries?
Ten-year-old Kevin McCallister, the boy left home alone, sets up traps that are played for laughs, but many involve levels of force that would be catastrophic in real life. A 100-lb (45-kg) bag of cement to the head, bricks dropped from height, or heavy tools swung at the face are not things a human body can simply shrug off. High-impact trauma to the head and neck rarely ends well.
To understand why, it helps to know a little about skull anatomy. The skull has a protective “vault” that encases the brain, while the bones of the face contain hollow spaces called sinuses. These spaces reduce the weight of the skull but also act as a biological crumple zone, helping to absorb force and protect the brain during impacts. But that protection has limits.
A rough calculation of the forces involved when a 100-lb bag of cement strikes the head suggests instant fatal injury. The neck simply cannot absorb that level of force. To put that in perspective, research shows that the cervical spine suffers severe damage above about 1,000 newtons of force. A 100-lb cement bag already exerts roughly 440 newtons under its own weight, and when falling, it decelerates over a very short distance on impact.
While the exact force depends on the height of the fall and how quickly the bag comes to a stop, even conservative assumptions place the impact well above 1,000 newtons, easily exceeding thresholds for catastrophic neck injury.
Beyond that, there is a high risk of brain herniation, where swollen brain tissue is forced into spaces it does not belong. This can compress areas that control breathing and movement, often leading to coma and death.
Head injuries are only part of the problem. Many of Kevin’s traps would also place enormous stress on the chest and major blood vessels. Falling forward from a height, being crushed by heavy objects, or being struck in the torso can cause severe internal injuries. These forces are commonly seen in high-speed, head-on car crashes. In extreme cases, the impact can rupture the aorta, the body’s main artery, which is almost always fatal.
Crush injuries elsewhere in the body can have serious and life-changing consequences. Even if they are not immediately deadly, they can cause internal bleeding that worsens over hours or days. Broken ribs, for example, can puncture the liver, kidneys, or spleen, allowing blood to leak slowly into the abdomen. Damage to soft internal organs can also lead to infection, organ failure, or delayed death, depending on the severity.
Then there are the less obviously lethal moments. When Marv crashes into a shelf stacked with paint tins and the shelf falls on him, the impact alone could cause serious internal injury. And paint splashed into the eyes could cause chemical burns and blindness.
Simple slips and falls are not harmless either. The bones at the back of the skull are only about 6-7mm thick. A hard blow here can cause bleeding inside the skull. These brain bleeds do not always show symptoms immediately and may worsen over hours or days after what seemed like a minor bump.
Electricity is another recurring gag that would be anything but funny in reality. When Marv grabs the taps attached to an arc welder, he is exposed to electrical current that causes his muscles to contract uncontrollably. This is why people who touch live electrical sources often cannot let go. The current overrides the body’s normal nerve signals. Prolonged exposure increases the risk of disrupting the heart’s normal rhythm, potentially triggering cardiac arrest.
Despite what cartoons suggest, electricity does not make the skeleton visible — as we see happen to Marv. There is no X-ray radiation involved. To expose bone, you would need extremely high-voltage current, causing fourth-degree burns, which destroy skin, muscle, and bone.
Piercing injuries also feature heavily. A nail through the foot is not just painful. It can damage nerves and soft tissues, fracture bones, and introduce bacteria deep into the wound. This raises the risk of serious infection, including tetanus.
Finally, there is Harry’s infamous blowtorch scene. Being set alight for 22 seconds is more than enough time to cause permanent nerve damage, potentially destroying pain sensation altogether. While scalp skin is among the thickest on the body, it has relatively little cushioning underneath. This makes the underlying tissue and bone more vulnerable to deep burns, reaching third or even fourth degree severity, which can be lethal.
Add combustible kerosene to the mix and the risks escalate further. Exposure is linked to kidney damage, heart problems, central nervous system depression, and serious respiratory issues.
In short, Harry and Marv are walking medical impossibilities. Surviving a second round of Kevin McCallister’s festive booby traps would require extraordinary luck, immediate trauma care, and months of rehabilitation. Even if they appeared outwardly fine, the internal damage would probably be devastating. Perhaps those lingering injuries explain why the Wet Bandits never made it back for another sequel. — The Conversation via Reuters Connect
Adam Taylor is a Professor of Anatomy at Lancaster University.
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