Watch FilmoFlix. More than thirty years ago, Louis van Gasteren made the documentary BEGRIJPT U NU WAAROM IK HUIL? about a therapeutic LSD session that professor Jan Bastiaans did with a traumatised ex-prisoner of German concentration camps. The patient died in late 2000 at the age of 81. He left a wife and three children. Poignant conversations with the widow and youngest son, and excerpts from letters from the other two children reveal that a concentration camp syndrome can also inflict deep wounds in those who have not personally experienced it.