You are right, DM. They say over and over again not to take off your seatbelt until instructed by the attendant. He wouldn't have been able to get his foot onto the track if his seatbelt was on.
Last week, there was a tiny little boy riding with me. I'm assuming he passed the height test or wouldn't be riding but he was the smallest kid I have ever seen on the ride. There were 8 in the child's party and 6 went on one car and the mom and the child went on mine. (I didn't even know the family and I was a single rider.) The mom got in the front and put the child alone in the back by me. The kid kept trying to unbuckle the seatbelt and was also leaning forward during the ride. I know exactly when the spins are on the ride and I was freaking out. I didn't shoot the gun once as I spent my whole time, hanging onto him when he tried to sit forward. Finally, when we were going through the "big, big bug" and getting ready for the final spin, he reached for his seat buckle again and I yelled "Don't you dare touch that buckle, young man!"
When I got off, I alerted an employee he (the little boy) shouldn't be allowed to ride again.