Involuntary psychiatric hold

5150 is a section of the California Welfare and Institutions Code allowing involuntary 72-hour psychiatric hospitalization in cases of mental health crisis. The term entered pop culture through Van Halen's album '5150' (1986).

The album '5150' (1986) was Van Halen's first recording with vocalist Sammy Hagar after David Lee Roth's departure. It debuted at number one on the Billboard 200. The title hinted at the 'madness' of the lineup change.

The term '5150' is widely used in American hip-hop as a synonym for madness, inadequacy or genius on the edge. Artists like Snoop Dogg and Weezer have used it in lyrics and titles.