Complex sentence: Guests put on Polarized 3D glasses, which Ms. Duncan calls "safety visors", to watch a demonstration of the Terminators, when John and Sarah arrive to disrupt the proceedings, followed by a T-1000.
Split into simpler sentences: Guests put on Polarized 3D glasses, which are referred to as "safety visors", to watch a demonstration of the Terminators. However, John and Sarah arrive to disrupt the proceedings, followed by a T-1000.