I once had the opposite experience. Calmly and amiably complained about an employee misbehaving, but got asked aside by the manager to talk. She asked me to put the complaint in writing through their system and, looking directly at my eyes, added “Please feel free to be as explicit and emotionally expressive as you want. Don't refrain from expletives, rudeness and bad words. We would really, really want to understand the extent of your upset over this situation, you know what I mean?” That's when I realized that she wanted to fire this employee guilt free and was asking me to give her the ammo for the firing squad in front of HR.