i work as an engineer at a theme park and i would think that a ride as modern as the "zacspin" would have detection for each individual harness, ie if the lad was too big to ride, the ride would have flagged it and not be allowed to be operated. i have ridden the same ride on a number of occasions and find it amazing that this has happened. the ride attendants have headsets linked to the main operator, so if there was an issue during dispatch, im sure it would've been seen.