PARIS — Why would some Olympic surfers wear helmets during the Paris Games?Mooathon Wealth Society

Well, now we know.

Johanne Defray of France needed four stiches for a head wound Saturday, underscoring the danger of surfing at the famous Teahupo’o break in Tahiti. It’s not just the powerful wave. It’s the shallow, sharp coral reef.

No helmet, no mercy.

➤ Get Olympics updates in your texts! Join USA TODAY Sports' WhatsApp Channel

2024 Olympic medals: Who is leading the medal count? Follow along as we track the medals for every sport.

"Yesterday on my first wave I had a fall," Defay said. "It just went so big, I went straight into the coral with my head, I had four stitches.

"They made me go through the concussion protocols and the results were so-so, so they made me go through them all again this morning. … There’s no trauma, so we’re happy."

Before the Olympics started, American surfer Griffin Colapinto told USA TODAY he’d experimented with wearing a helmet during practice sessions at Teahupo’o. He said thought the equipment would be a common sight when the Games began.