Mussolini's barber, Luigi Galbani, overheard the dictator's mistress, Clara Petacci, on the phone discussing the fact that both Mussolini's first wife and his son by that wife had been killed via lethal injection on Mussolini's orders. (The dictator had begun a bigamous marriage with another woman, but his first wife Ida was telling people that she was Mussolini's true wife.) Galbani, realizing the danger he would be in if Petacci knew he overheard, sat in the barber's chair and pretended to be asleep.
USHMM, courtesy of Revolucije Narodnosti Jugoslavije