A horrific accident in India killed a Chicago area tech CEO and seriously injured the company’s president, and the whole thing was caught on video.

What was designed to be a celebration of success turned tragic when CEO Sanjay Shah, 56, and the company president, Raju Datla, 52, fell 15 feet in front of a packed audience at a party for employees of Vistex, a software company based in Hoffman Estates, Ill.

One of the highlights was an aerial show. A specially designed stage made of wood was elevated 20 feet above the concrete stage using a crane. Shah and Datla were in an iron cage.

They were supposed to be lowered, but the iron chain supporting the cage broke on one side, causing them to fall 15 feet onto the main stage.