Transient and hardly traceable signs of diminished consciousness might be the only signs that are apparent and reported during the scrutinous care of intensive care unit (ICU) staff. Unfortunately, most transient loss of consciousness (TLoC) episodes occur elsewhere. This review aims to help recognize TLoC and identify situations when these conditions mean that certain legal privileges should be held. With this aim, the current literature was scoped for conceptualizing consciousness, its alterations, and loss as regarded in the legal system. This review was partly inceptive for increasing the use of unconsciousness as a defense against criminal charges.