The case was in the distant Soviet times, when they pulled virtually everything, and virtually everything that lay bad... Prepod at the time worked at a chemical factory producing ammonia. To produce it, several components are needed, including platinum, as an optimal catalyst, for which a platinum grid was used for the entire volume of the chemical reactor. And here comes the prey to work, and there is a mess... They stole 100 kilos of this same grid... Everyone runs with such eyes O_O. The new grid will cost a lot of money. Some uncompromising proletarian cut it down and brought it home, where a chicken drove it safely. And what, it does not rust and does not rot, and chickens will not run away, beauty!