According to the mathematical model of quantum mechanics (QM), there is a concept known as quantum tunneling that allows for particles to pass through energy barriers that would be classically forbidden. This phenomenon has been observed and is an essential aspect of various quantum mechanical processes.
However, when it comes to macroscopic objects like your body, the probabilities involved in quantum tunneling are exceedingly small, making such spontaneous and dramatic events effectively impossible under normal conditions. The reason for this is that the probability of a macroscopic object, such as a human body, tunneling through a significant energy barrier is exponentially suppressed due to the large number of particles and their interactions involved.
The laws of classical physics and statistical mechanics provide a robust framework to describe the behavior of macroscopic objects in our everyday lives. These classical laws emerge as an approximation from the underlying quantum mechanical behavior of individual particles. At the macroscopic scale, the probabilistic nature of quantum mechanics becomes negligible, and classical behavior dominates.
While quantum mechanical effects are responsible for the fundamental behavior of particles, the probabilities associated with spontaneous and dramatic events involving macroscopic objects are so astronomically small that they are considered effectively impossible in our current understanding of the universe.
It's important to note that the probabilistic nature of quantum mechanics can lead to unpredictable events at the microscopic level, but when dealing with macroscopic objects, the laws of classical physics provide accurate and reliable predictions.