Roberta Ursrey was at a beach with her family in Panama City, Florida on Saturday. Her sons, ages 8 and 11, were too far out in the water, turns out there was a really strong riptide.

Her whole family swam out to get them. Which just made things worse, because now nine people were stuck out there, and the current kept pulling them under.

Roberta says she thought she was about to lose everyone. Then in the middle of it, her mom started having a massive heart attack out in the water.

Luckily, Jessica Simmons was on the beach and realized what was happening, and started swimming out on a boogie board. Meanwhile, her husband stayed back and got everyone on the beach to form a human chain.

About eighty people linked arms, some of them didn't even know how to swim but helped anyway. The chain worked and they rescued everyone.

Roberta Ursrey

Roberta's mom got to a hospital and she's recovering, her nephew broke his hand, but no one else was seriously hurt.

Jessica said afterward that watching all those people work together was one of the most remarkable things she's ever seen.

Read more at Orlando Sentinel.