By Cecilia Adamou & William McGee Footage shows the moment a “poltergeist” disrupted an audience and actors halfway through a production by throwing a prop onto the ground, during a scene when the cast were gathered around a Ouija board. During a production of a horror play in Buenos Aires, Argentina, a video shows the actors using a spirit board to contact the dead. Part-way through the scene, one of the thespians can be heard on the video saying “What’s your name?”, as the group move the pointer around the board spelling out the name Ola. Then, as the actor repeats the name, a deafening bang…