Guess he didnt see the sign saying YOU MUST BE THIS THIN TO RIDE THIS ATTRACTION.
Are his feet planted on a floor to this ride, or dangling? If a floor, then he can simply push himself up and not be strangled here. I've watched this video several times in fascination and still trying to figure how there was so much slack in the straps for him to slink down that far, I have to assume he just scrunched down in fear but was able to control his fate with his feet if he needed to push back up so as not to strangle himself?