A 13.6 second loop. Four rungs are stacked from top to bottom: defect, incident, accident, emergency. A round token showing a fictional event drops down a chute beside the ladder, briefly lighting each rung it passes, and stops at the rung that fits. The pathway for that rung then appears beside it. A damaged propeller is a defect: fix before flight. A lost link that was recovered is an operational incident: operator report. A serious near miss sits on the accident, serious incident or reportable occurrence rung: check ATSB and CASA requirements now. A fire is an emergency: respond first, before aviation paperwork. With "All four" selected, the four events are sorted in turn. With one event selected, only that event is sorted and held. The ladder is a study prompt, not a legal decision tree. The still frame shows the serious near miss on the accident rung.
