Why does the induction melting furnace need 2 people to operate?

In the process of using the induction melting furnace, there must be more than 2 furnace workers on the furnace table, so that they can take care of each other, and in the event of an accident, they can be rescued in time.

It happened once: one of the two furnace workers went to the warehouse to pick up materials, and when he returned, one of the furnace workers fell on the stove top (the cause of death is unknown); when one came back from the toilet halfway, he found that the other fell in the furnace and was burned to death. (Why hasn’t been found out yet).