It is a good possibility that people test riding the attraction were required to remove their hard hats for safety prior to the final drop. You certainly don’t want a hard hat flying loose and injuring the person behind you. Same reason why you’re advised to secure you hats and loose personal items prior to riding these types of rides (including Splash).I’m not sure about this- the imagineers in the logs aren’t wearing hard hats. If the show scenes were still an active construction zone, they would most likely be wearing them. I’m chalking up the lack of an announcement to either minor technical difficulties that need to be ironed out or Peltz, as some people have said.