Why does the boss torture the fly?

The boss tortures the fly as a demonstration of power and control, showcasing his dominance over a weaker being. This act may also reflect his inner frustrations and inability to assert his authority in more meaningful ways. By inflicting pain on the fly, he distracts himself from his own vulnerabilities and insecurities. Ultimately, it's a manifestation of his need to exert influence in a world where he feels powerless.