Umkippen

Umkippen (Germ. "tip," "upset") is the event that happens when Wesen force themselves to woge too many times and too often. Their Wesen side can eventually start to take over. If a Wesen is suffering from the Umkippen, their Wesen side can get out of control and completely eclipse any shred of humanity left if one does not go through some form of intervention. The suffering Wesen suffers blackouts and doesn't remember anything during the time that they lose control.