Spinwatching
A specific form of people watching that focuses on people who appear to be under the influence of stimulants like methamphetamine and have lost control of their motor functions. This results in rapid, erratic and exaggerated movements of the head, limbs , extremities and facial muscles. Sometimes the person will also have outbursts of nonsensical speech or arguing with imaginary people.
If you're going spinwatching at the pier tonight, make sure your phone is charged and you don't get too close to your specimens.