I couldn't help thinking, while listening to the news reports on the hearing why their training did not include practical training in actually getting staff to hit the stop buttons etc to observe what happens. They could turn the pumps off and have staff watch what happens to the tubes on the conveyer chain, explain what could happen and have the staff practice using the emergency stop controls to gain confidence in using it without a second thought. With the emphasis on staff immediately shutting the ride down if anything seems amiss, without fear of punishment.
Wayne