Oh my goodness, just reading your story gives me goosebumps. It must have been so thrilling to watch.~ ^^ 

*Correction:

Continuing, the accident is a delivery man who believed that corporate colleagues were dismissive of him, so he placed mercury in sandwiches and delivered them. Every employee who ate these sandwiches acted strangely. Someone attempted to commit suicide. Despite the police barricade, they attempted to jump out the window. That was an odd and bizarre scene. It appears to be a zombie. I'm baffled by the sandwich delivery man's motivation. His guess is that the staff disdain him, but I can't think that lead to crime. People tried to die with a poker face, which impressed me. It was terrifying.