Raja, who is executive vice chair of emergency medicine at Mass General Brigham, said injured older riders he treats often spontaneously decided to rent an e-bike.

“They will walk out of a building and see a rental and say, ‘I will use one of these,’” he said. “That spontaneity means they don’t have a helmet or much experience.”

So, skill issue.

Remind me of this video https://youtu.be/2JYJF9L5YW4