If someone in your life (your boss, maybe) is acting like an insane person, you can easily de-escalate the situation by refusing to take responsibility for their bad mood. Don't fret about what you may or may not have done. That's not at all relevant. If they do get careless and aim their temper tantrum your way, leave your ego out of it and don't jump into the fray. You might actually end up feeling a little sympathetic!