I was interviewing for a sales job and had been awake for 3 days, and for some reason I thought I was doing badly due to insomniac paranoia or something and my brain just decided to stand up and go into this 'wolf of wallstreet' type rant about how I "want other people's money" and how "greed is good" etc.. but in a really tired, slurred voice.
They said it was the worst interview they'd ever seen.