"In the middle of the afternoon, her 1.5 m houseplant (Ficus benjamini) suddenly lost all its leaves. The secretary's boss decided to call the fire brigade."

Popp W, Mentfewitz J, Götz R, Voshaar T.
Phosphine poisoning in a German office.
Lancet. 2002 May 4;359(9317):1574.