A cat in the brain), also known as Nightmare Concert,[2] is a 1990 Italian horror film written and directed by Lucio Fulci.

[3] Fulci stars as a fictionalized version of himself, a tortured horror filmmaker who is driven by the violent visions that he experiences both behind the camera and off the set.

[5] A Cat in the Brain has been called the horror film equivalent of Federico Fellini's 8½, using cynical, Grand Guignol humour.

Later, while checking special effects from another movie, Fulci irritably snaps at a technician to get a plate of animal eyeballs out of his sight.

Schwarz discusses Fulci's recent problems and suggests that he's "breaking down the barrier, the boundary between what you film and what's real."

After Fulci leaves the set, his producer steers him into a studio suite for an interview with a Munich news crew.

The sight of the tall, blond, German lady reporter's long legs triggers a vision of sexual abandon in Nazi Germany (from the film Ghosts of Sodom).

When Fulci recovers from his vision, Filippo then informs the confused director that he has just run amok, smashed the TV crew's camera, and tried to rip the interviewer's clothes off.

After returning home, he phones the police station to speak to his friend Inspector Gabrielli, intending to make a "confession."

After another visit to Professor Schwarz is of little help, Fulci decides to drive over to Inspector Gabrielli's house in the hope of speaking to him.

Just when it appears that Fulci is a crazed killer after all, it is revealed that it's the end of his latest movie, Nightmare Concert, captured by a film crew in another boat sailing alongside.

The wrap-around segments were largely shot in and around Rome Cinecittà Studios and on Fulci's private yacht, Perversion.