When Grown Adults Act Like Children

This isn’t the usual kind of thing I like to discuss but I’m going to vent a little. Today I practically had to pick my jaw up off the ground after overhearing and seeing two very grown adults in leadership positions behave like catty, mean, bully-headed teenagers while they didn't realize anyone was standing in earshot of them. It shouldn’t (because it happens everywhere) but it does, boggle my mind that grown adults in professional fields where unity and teamwork should be a natural part of the culture, can be so full of ego and criticism that they think making fun of or belittling others in attempt to make themselves look smarter, better, whatever-have-you, is acceptable or even necessary