After a minute of silence at noon, Monday's remembrance of the 20th anniversary of the Rwandan genocide began with testimony from a survivor.
The screaming started soon after.
In the crowd of 30,000 gathered in Amahoro stadium in Kigali, the Rwandan capital, first this person then that began to wail and thrash. Men in yellow vests took them to a special room of mattresses in the stadium basement.
In general, Rwandan culture discourages such outward displays of grief. But not during this time of year, when traumatic flashbacks are common.