I got burned by my liar coworker. I thought he was annoying but harmless until he lied to the boss about me to keep himself out of trouble. Long story short, I snapped at him and yelled a curse word. Another coworker tattled to the boss that he was being a jerk and egging people on about a topic he continually abused (but she didn't mention me.) When confronted by the boss, he started chirping like a baby bird, telling the boss I attacked him repeatedly, punching and screaming curse words, showed her a bruise I supposedly gave him, etc. The boss called me in and SCREAMED at me, told me I was a horrible person, set up a meeting with the HR director and asked me if I wanted union representation. I was terrified I was going to get fired. I finally convinced the boss I never attacked or hit him (I'm a good foot shorter, female and have never been in a physical fight in my life!) After talking to several coworkers who witnessed what happened, she believed me and everything sort of got swept under the rug. To this day, crazy coworker completely believes I beat the crap out of him. Whatever.