What should cabin crew do when the aircraft decelerates during a rejected take-off?

In the context of a rejected take-off, it's crucial for cabin crew to immediately communicate clearly and effectively to ensure passenger safety and manage the situation. Shouting commands is an essential part of this response because it helps to quickly gain the attention of passengers, making them aware of the potential emergency. Clear, loud commands can guide them on how to respond appropriately, such as sitting down and securing themselves during the deceleration process.

While remaining calm is important, it doesn’t address the immediate need for direction during a potentially chaotic situation. Securing loose items is also important, but the priority must be on controlling the cabin environment and reassuring passengers first. Advising passengers to return to their seats is a necessary message but should be part of the shouted commands in order to ensure that it's heard and acted upon promptly. Therefore, the emphasis on loud commands is crucial for both safety and effective emergency management in this scenario.