This would be enough to make any kid terrified of roller coasters. At an amusement park in Texas a father and son were riding a roller coaster. During the first drop, the kid slips out of view as his seat belt malfunctioned and released. After that, the dad grabbed onto him and held him in for the rest of the ride. 

This dad should win an award for how calm he stayed during the whole thing. However, wait until you hear the response from the park employee.