Story highlights Small boy thrown to bottom of rollercoaster cart after his seat belt comes undone

Operator knew seat belt had malfunctioned several times but still let riders on, dad says

(CNN) What was meant to be a fun day of riding roller coasters at the amusement park turned into a very scary ordeal for one family.

Delbert Latham and his 6-year-old son Kayson were on a roller coaster at Wonderland, an Amarillo, Texas amusement park, when Kayson's seat belt came undone mid-ride.

Latham, who happened to be recording video to show his wife, captured the moment his son's seat belt releases and Kaysen is thrown to the bottom of the cart.

He quickly grabs his son and clutches his son for the rest of the ride, while trying to reassure him: "You're fine. I promise. I gotcha. There are no more big hills."

Latham told CNN-affiliate KVII he notified the ride operator about what had happened but was angered by the response he received:

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