Mass hysteria

As defined by Abby McPhail, mass hysteria referred to "a shared madness".

The temporary disappearance of the Royal Hope Hospital in 2008 was attributed to being a case of mass hysteria, even by those who were inside the hospital, such as Oliver Morgenstern. (AUDIO: Hysteria) In reality, the "disappearance" of the hospital was caused by the Judoon transporting it to the Moon, using a H₂O scoop. (TV: Smith and Jones)