In 2008 in Scotland, 30 police officers raided The Arches nightclub in Glasgow. They discovered a “mass orgy”. Inside the club, all 30 of the officers stormed over to an area behind a partition where they found many men engaged as a group in gay sex. The officers attempted to make arrests but when the orgy participants saw the men in police uniforms waving truncheons and handcuffs, they assumed it was all part of the orgy and enthusiastically tried to incorporate the officers into the recreational mêlée. It took a while for the officers effectively to communicate their true purpose.
Via the Times.