I'll blow this conversation back open and back you up here - I've helped refit the ones on Dragon Falls when the springs and the like have broken and it is an anti rollback system - in the event that the main conveyor belt did snap. Yes the ride will stop more than safely but anti grip will rarely work well enough to hold a boat load of potentially 500kg from slipping down the hill - what if the belt snaps, as Pluk has pointed out?Whoever thinks that 'it's meant to be like that' is talking total cottage cheese - all the ones on Dragon Falls are working and click properly onto the boats! If one was broken, the ride wouldn't open!