If only they'd worn a helmet...

A place to document incidents where a helmet may have prevented injury.
For example:
http://amp.ktvu.com/news/san-francisco-3-year-old-suffers-traumatic-brain-injury

http://www.omaha.com/news/crime/people-are-injured-in--vehicle-crash-in-northeast-omaha/article_00535f98-e1ad-11e7-9d58-c7e82a352007.html

A 13-year-old boy who was a passenger in the car suffered a head injury and was unconscious at the scene.

http://www.wbay.com/content/news/Appleton-Police-investigate-report-of-bullying-at-elementary-school-463945323.html

a student received a head injury as the result of a bullying incident involving a fellow elementary student," reads a statement from the police department.

http://www.mirror.co.uk/news/uk-news/man-who-suffered-brain-injury-10976209

https://www.thesun.co.uk/news/4268943/tanning-sunbed-too-long-mum-left-coma-gillingham-caroline-wood/

The 40-year-old then collapsed 12 hours later, falling down the stairs at her home in Rainham, east London.

http://www.fieldfisher.com/personalinjury/case-studies/brain-injury/barrister-who-suffered-brain-injury-recovers-substantial-compensation

he went to the bathroom at Daly’s wine bar which was situated down steep stairs. On his return up the stairs he fell. The evidence suggested that he had fallen from the very top of the stairs to the bottom and he suffered an extremely serious brain injury.