Based on the search results, "the spins" is a term used to describe an adverse reaction of intoxication that causes a state of vertigo and nausea, causing one to feel as if "spinning out of control", especially when lying down. It is most commonly associated with drunkenness or mixing alcohol with other psychoactive drugs such as cannabis. The feeling of spinning is due to impairments in vision and equilibrioception (sense of balance) . Diplopia (double vision) or polyplopia are common, as well as the symptoms of motion sickness and vertigo. The spins can occur when someone lays down and shuts their eyes following a long night of drinking. The sensation can begin with a fairly low blood alcohol concentration (BAC) . The more intense the change in the body’s position, the stronger the signal relayed to the brain. But what happens when the hypothetical weathervane inside the ears moves when the body doesn’t? According to Dr. Crowson, the brain becomes confused by the mismatch in signals and a false sense of movement commonly referred to as vertigo, or “the spins,” ensues.