Dealing with a problematic employee can be the worst, especially when they try every trick in the book to sidestep taking responsibility for their actions. For a supervisor in this position, things can get frustrating fast.
One guy had to discipline a new hire who always played the victim, even though his incompetence was clear as day. The employee somehow got HR to nix the write-up, but little did he know his manager would have the last laugh.
More info: Reddit