A 19-year-old has died after suffering a head injury during a tackle game - known as run it straight - with friends on Sunday.
Police say the impromptu event was based on a social media-driven competition, where people run into each other for full-contact collisions without protective gear.
Sportstalk host D'Arcy Waldegrave explains further.
LISTEN ABOVE

Nicola Willis: Finance Minister brushes off worries about fast track for housing projects
07:22

Mike Casey: Rewiring Aotearoa CEO on shortage of electricians as solar panel demand soars
05:12

Richard Harrison: Auckland Transport Public Transport Director on CRL first weekday, Warriors this weekend
02:55