Beachgoers weren't the only ones playing in the waves this past weekend.
A 6-foot-long hammerhead shark was spotted in the shore break at Kailua Beach.
This area of the beach is known as "Flagpoles."
Jack Mullen shot this video on Saturday around 3:30 p.m. He says the shark swam in to shore twice on that day.
"It was thrashing around and then it left, so I went and jumped back in the water," said Mullen. "Then we hear more screaming down the beach. So then, I ran down and got the video."
Mullen shot this video with his GoPro. He says earlier in the day, surfers spotted a much larger shark near this area.
Mobile users can click here to see the video.