Chair from the Norrmalmstorg Bank Robbery

Origin
The Norrmalmstorg robbery was a bank robbery turned hostage crisis in 1973 Sweden. Jan-Erik Olsson shot one police officer during his attempt and forced the other to sit down and sing something, taking four people as hostages. He demanded his friend Clark Olofsson be brought there, along with 3 million Swedish Kronor, two guns, bulletproof vests, helmets, and a fast car. He received his friend and conversed with Prime Minister Olof Palme twice, but none of his other demands were met. He and Olofsson surrendered after the use of gas by the police, leaving the hostages unharmed; they both faced new prison sentences afterwards.

Interestingly, the hostages said they were more afraid of the police rather than their captors, sympathizing with the bank robbers. This phenomenon, now known as Stockholm Syndrome, is where a hostage positively identifies with their captor, sometimes even defending them and joining their cause.

Effects
Sitting in the chair and singing makes those that hear it sympathize and like you, creating a Stockholm syndrome like effect. Those affected will follow most of the user’s requests, even if it goes against their moral standards and instinct of self-preservation.