Begrijpt u nu waarom ik huil? (1969)
The work of Leiden professor Bastiaans on dealing with the trauma of war victims attracts the attention of filmmaker Louis van Gasteren. He decides to make a film about the psychotherapeutic treatment with LSD of a former concentration camp prisoner in the clinic of Bastiaans. Patient Joop is arrested in September 1941 and begins a long hellish journey through various camps, until he is liberated by the Russians. When he returns to his wife, he has become a completely different man. Joop suffers from nightmares and is incapable of normal human contact. With two cameras, Van Gasteren records approximately six and a half hours of the first treatment that Joop undergoes with Bastiaans (four more will follow later). Special attention is paid to details: Joop's hands, the sweat on his forehead, a tear running slowly down his cheek. Van Gasteren reduces the recordings to more than an hour.
Director: Louis van Gasteren
| Crew | Jan de Bont | Cinematography |
| Directing | Louis van Gasteren | Director |
| Sound | Don Heerkens | Sound |
| Sound | Barry van der Sluis | Sound |
| Sound | Wim Wolfs | Sound |
| Editing | Bato Bachman | Editor |
| Editing | Huib Duyster | Editor |
| Editing | Rolf Orthel | Editor |
| Production | Louis van Gasteren | Producer |
| Production | Joke Meerman | Producer |
| Crew | Peter Bos | Cinematography |
| Crew | Jos van Schoor | Cinematography |
