In December 1993, Atlanta attorney Dennis Scheib stopped by the prosecutor's office on his way to court to represent a new client in a criminal case. Just outside the office, he saw two officers chasing a man down the hall, and he joined in to help. The three men caught the escapee and handcuffed him.
Later Scheib learned the man was the client he had been on his way to court to represent.
I don't know if this is a true story, but it's funny anyway.