Most essential is the central performance: Zengel’s oscillating wild joys and storming furies are painful to watch. A moment when she howls for her mother (always tantalisingly out of reach) brought me to tears.

This is a wildly impressive first narrative feature, powered along by a strong cast, great chemistry, virtuoso flourishes, and fierce energy.

System Crasher is the outstanding feature film debut of German director Nora Fingscheidt. A tremendous slice of life filled with light and energy, which doesn’t shy away from the tough realities of what social care is like for children with severe developmental issues.

A grisly, gripping watch.

System Crasher may veer towards being over-sympathetic in its approach to its violently problematic protagonist – Benni is a wrecking ball at times – but it delivers a powerful exposé of the limitations of the foster system. And with its impressive young star to the fore, it is heartbreakingly intimate.

Zengel is a balled-up fist of energy in the title role, getting across the sweetness that can convince those who take pity on Benni that “she’s making progress,” but unleashing hell in a flash to remind them she isn’t.