What is the most no f**ks given thing you've seen in a professional environment?
I was once working at a small corporate finance advisory firm that was setting up it's own fund/asset management arm. I was in a room with the CEO/majority shareholder (who for context was a person of....non-abundant social skills) and two other senior people. I was presenting my analysis of the fund's first big investment, (so obviously a very important thing for this firm) and in the middle of my sentence, the CEO just stood up and walked out without saying a word. For a couple of seconds the rest of us just sat there staring at each other, wondering WTF just happened but then I just continued with my presentation.