But the alarm in their voices quickly rises as they pass the overturned craft and they hear the distressed cries of the couple desperately trying to free their children trapped underneath.
"Oh my God! What do we do? What do we do?" they ask each other. "I can't stop!"
The boys' father David tried to lift the craft but couldn't, having broken his shoulder in the crash.
"I'm looking around for anybody to help us, I'm saying 'Help! Our children are drowning!'" he said.
"You could see the kids' little hands, and they were just trying to reach for us to help them, and I was trying...it was so bad, I didn't know what to do, they were drowning upside-down."
update 7/6/2021 8:05 AM
An 11-year-old boy is dead and his 15-year-old brother has been left in a coma after an accident on a water ride at an Iowa amusement park.
Michael Jaramillo and his big brother David were aboard the Raging River at Adventureland Park in Des Moines on Saturday when their raft flipped over, trapping them beneath.
The siblings had boarded the ride along with their parents, little brother Gus, and cousin Mila. The other four managed to escape, but the two brothers could not free themselves from their seatbelts, and were pinned underwater.
The force of the water on the ride prevented their father David from desperately trying to save them.
"I'm drowning," he told GMA from the hospital Tuesday morning. "The river was so intense, it was like a suction."
"I see the silhouettes of my sons trying to grab each other, grab us," he said. "They want us to help them. We couldn't do it."
Bystanders jumped in to pull the other two children from the water. The brothers were eventually freed from the ride and were rushed to hospital. However Michael succumbed to his injuries the following day, while David is still fighting for his life in a medically induced coma.
"He was a baby and I feel like Adventureland robbed me of my baby," his mother Sabrina sobbed. "I will never get a chance to see him grow up or get a chance to see him graduate."
"He was just taken from us," her husband added. "Love your kids. You just don't know when they'll be taken."
David turns 16 on Wednesday; the family had been at the park to celebrate his upcoming birthday.